{
  "name": "Lake Ronkonkoma, New York",
  "url": "https://longislandtraffic.com/towns/suffolk/lake-ronkonkoma/",
  "updated": "2026-09-17",
  "publisher": "Long Island Traffic (https://longislandtraffic.com)",
  "methodology": "https://longislandtraffic.com/towns/methodology/",
  "reuse": "Quote with credit and a link to the page URL above. Underlying federal and state datasets are public records.",
  "geography": {
    "slug": "lake-ronkonkoma",
    "county": "suffolk",
    "censusName": "Lake Ronkonkoma CDP",
    "geoType": "census-designated place",
    "legalStatus": "hamlet (unincorporated)",
    "geoid": "3640838",
    "gnisId": "2390024",
    "pop2020": 18619,
    "housingUnits2020": 7223,
    "landSqMi": 4.54,
    "waterSqMi": 0,
    "densityPerSqMi": 4104,
    "internalPoint": [
      40.83032,
      -73.1133
    ],
    "parentTown": "Brookhaven town",
    "parentTownGeoid": "3610310000",
    "townShares": [
      {
        "name": "Brookhaven town",
        "share": 0.725
      },
      {
        "name": "Smithtown town",
        "share": 0.275
      }
    ]
  },
  "fatalCrashes2010to2024": {
    "period": "2010–2024",
    "crashes": 19,
    "deaths": 19,
    "pedestrianDeaths": 8,
    "bicyclistDeaths": 2,
    "motorcyclistDeaths": 4,
    "crashesWithDriverBac08": 4,
    "multiFatalityCrashes": 0,
    "onLimitedAccessHighways": {
      "crashes": 6,
      "deaths": 6
    },
    "deathsPer100kResidentsPerYear": 6.8,
    "byYear": [
      {
        "year": 2010,
        "crashes": 2,
        "deaths": 2
      },
      {
        "year": 2011,
        "crashes": 3,
        "deaths": 3
      },
      {
        "year": 2012,
        "crashes": 3,
        "deaths": 3
      },
      {
        "year": 2013,
        "crashes": 0,
        "deaths": 0
      },
      {
        "year": 2014,
        "crashes": 1,
        "deaths": 1
      },
      {
        "year": 2015,
        "crashes": 1,
        "deaths": 1
      },
      {
        "year": 2016,
        "crashes": 0,
        "deaths": 0
      },
      {
        "year": 2017,
        "crashes": 1,
        "deaths": 1
      },
      {
        "year": 2018,
        "crashes": 2,
        "deaths": 2
      },
      {
        "year": 2019,
        "crashes": 1,
        "deaths": 1
      },
      {
        "year": 2020,
        "crashes": 0,
        "deaths": 0
      },
      {
        "year": 2021,
        "crashes": 2,
        "deaths": 2
      },
      {
        "year": 2022,
        "crashes": 2,
        "deaths": 2
      },
      {
        "year": 2023,
        "crashes": 0,
        "deaths": 0
      },
      {
        "year": 2024,
        "crashes": 1,
        "deaths": 1
      }
    ],
    "byTimeOfDay": {
      "known": 19,
      "morning6to10": 0,
      "midday10to16": 2,
      "evening16to20": 6,
      "night20to6": 11
    },
    "darkShare": 0.737,
    "topRoads": [
      {
        "name": "Long Island Expressway (I-495)",
        "slug": "lie",
        "crashes": 6,
        "deaths": 6
      },
      {
        "name": "Long Island Expressway service road (Express Drive)",
        "slug": null,
        "crashes": 3,
        "deaths": 3
      },
      {
        "name": "Ronkonkoma Rd",
        "slug": null,
        "crashes": 1,
        "deaths": 1
      },
      {
        "name": "Rosevale Ave",
        "slug": null,
        "crashes": 1,
        "deaths": 1
      },
      {
        "name": "Ronkonkoma Ave",
        "slug": null,
        "crashes": 1,
        "deaths": 1
      },
      {
        "name": "County Route 16",
        "slug": null,
        "crashes": 1,
        "deaths": 1
      },
      {
        "name": "County Route 29",
        "slug": null,
        "crashes": 1,
        "deaths": 1
      },
      {
        "name": "Pond Rd",
        "slug": null,
        "crashes": 1,
        "deaths": 1
      }
    ],
    "roadOwnership": {
      "period": "2015–2024",
      "crashes": 10,
      "owners": [
        {
          "owner": "State Highway Agency",
          "crashes": 6
        },
        {
          "owner": "Town or Township Highway Agency",
          "crashes": 2
        },
        {
          "owner": "County Highway Agency",
          "crashes": 2
        }
      ]
    }
  },
  "allReportedCrashes": {
    "years": [
      "2021",
      "2022",
      "2023",
      "2024"
    ],
    "scope": "parent-town",
    "municipalityCode": "BROOKHAVEN",
    "label": "Town of Brookhaven",
    "total": 44155,
    "fatal": 172,
    "injury": 11428,
    "propertyDamageOnly": 32555,
    "byYear": {
      "2021": 10663,
      "2022": 10234,
      "2023": 11739,
      "2024": 11519
    },
    "pedestrian": 445,
    "bicyclist": 390,
    "deer": 599,
    "otherAnimal": 1027
  },
  "commute": {
    "workers16plus": 8688,
    "commutersNotWorkingFromHome": 7846,
    "meanTravelMinutes": {
      "value": 28.3,
      "moe": 4.1,
      "lowReliability": false
    },
    "pct60MinPlus": {
      "value": 11.8,
      "moe": 2.6,
      "lowReliability": false
    },
    "pct90MinPlus": {
      "value": 5.3,
      "moe": 1.8,
      "lowReliability": false
    },
    "pctUnder15Min": {
      "value": 28.7,
      "moe": 7,
      "lowReliability": false
    },
    "pctDroveAlone": {
      "value": 78.3,
      "moe": 4.8,
      "lowReliability": false
    },
    "pctCarpooled": {
      "value": 5.4,
      "moe": 1.8,
      "lowReliability": false
    },
    "pctPublicTransit": {
      "value": 3.7,
      "moe": 1.5,
      "lowReliability": false
    },
    "pctCommuterRail": {
      "value": 3.5,
      "moe": 1.4,
      "lowReliability": false
    },
    "pctBus": {
      "value": 0,
      "moe": 0.2,
      "lowReliability": true
    },
    "pctWalked": {
      "value": 1.3,
      "moe": 0.9,
      "lowReliability": true
    },
    "pctBicycle": {
      "value": 0,
      "moe": 0,
      "lowReliability": true
    },
    "pctWorkedFromHome": {
      "value": 9.7,
      "moe": 2.4,
      "lowReliability": false
    },
    "pctLeaveBefore6am": {
      "value": 12,
      "moe": 2.7,
      "lowReliability": false
    },
    "pctLeaveBefore7am": {
      "value": 28,
      "moe": 4.7,
      "lowReliability": false
    },
    "households": 6704,
    "pctNoVehicle": {
      "value": 3.5,
      "moe": 1.4,
      "lowReliability": false
    },
    "pctThreePlusVehicles": {
      "value": 26.5,
      "moe": 3.7,
      "lowReliability": false
    },
    "medianHouseholdIncome": {
      "value": 101633,
      "moe": 10614
    },
    "medianAge": {
      "value": 42.6,
      "moe": 2.2
    }
  },
  "benchmarks": {
    "county": {
      "workers16plus": 766432,
      "commutersNotWorkingFromHome": 674118,
      "meanTravelMinutes": {
        "value": 31.1,
        "moe": 0.4,
        "lowReliability": false
      },
      "pct60MinPlus": {
        "value": 14.1,
        "moe": 0.4,
        "lowReliability": false
      },
      "pct90MinPlus": {
        "value": 6.5,
        "moe": 0.3,
        "lowReliability": false
      },
      "pctUnder15Min": {
        "value": 22.8,
        "moe": 0.6,
        "lowReliability": false
      },
      "pctDroveAlone": {
        "value": 72.1,
        "moe": 0.4,
        "lowReliability": false
      },
      "pctCarpooled": {
        "value": 7.5,
        "moe": 0.3,
        "lowReliability": false
      },
      "pctPublicTransit": {
        "value": 4.8,
        "moe": 0.2,
        "lowReliability": false
      },
      "pctCommuterRail": {
        "value": 3.2,
        "moe": 0.2,
        "lowReliability": false
      },
      "pctBus": {
        "value": 0.6,
        "moe": 0.1,
        "lowReliability": false
      },
      "pctWalked": {
        "value": 1.4,
        "moe": 0.1,
        "lowReliability": false
      },
      "pctBicycle": {
        "value": 0.2,
        "moe": 0,
        "lowReliability": false
      },
      "pctWorkedFromHome": {
        "value": 12,
        "moe": 0.3,
        "lowReliability": false
      },
      "pctLeaveBefore6am": {
        "value": 12,
        "moe": 0.4,
        "lowReliability": false
      },
      "pctLeaveBefore7am": {
        "value": 30.2,
        "moe": 0.6,
        "lowReliability": false
      },
      "households": 512565,
      "pctNoVehicle": {
        "value": 5.1,
        "moe": 0.2,
        "lowReliability": false
      },
      "pctThreePlusVehicles": {
        "value": 28.8,
        "moe": 0.5,
        "lowReliability": false
      },
      "medianHouseholdIncome": {
        "value": 130686,
        "moe": 1707
      },
      "medianAge": {
        "value": 41.7,
        "moe": 0.2
      }
    },
    "state": {
      "workers16plus": 9306567,
      "commutersNotWorkingFromHome": 7916632,
      "meanTravelMinutes": {
        "value": 32.6,
        "moe": 0.1,
        "lowReliability": false
      },
      "pct60MinPlus": {
        "value": 16.8,
        "moe": 0.1,
        "lowReliability": false
      },
      "pct90MinPlus": {
        "value": 5.3,
        "moe": 0.1,
        "lowReliability": false
      },
      "pctUnder15Min": {
        "value": 20.5,
        "moe": 0.2,
        "lowReliability": false
      },
      "pctDroveAlone": {
        "value": 48.8,
        "moe": 0.1,
        "lowReliability": false
      },
      "pctCarpooled": {
        "value": 6.3,
        "moe": 0.1,
        "lowReliability": false
      },
      "pctPublicTransit": {
        "value": 21.6,
        "moe": 0.1,
        "lowReliability": false
      },
      "pctCommuterRail": {
        "value": 1.8,
        "moe": 0,
        "lowReliability": false
      },
      "pctBus": {
        "value": 5.1,
        "moe": 0.1,
        "lowReliability": false
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      "pctWalked": {
        "value": 5.6,
        "moe": 0.1,
        "lowReliability": false
      },
      "pctBicycle": {
        "value": 0.8,
        "moe": 0,
        "lowReliability": false
      },
      "pctWorkedFromHome": {
        "value": 14.9,
        "moe": 0.1,
        "lowReliability": false
      },
      "pctLeaveBefore6am": {
        "value": 10.6,
        "moe": 0.1,
        "lowReliability": false
      },
      "pctLeaveBefore7am": {
        "value": 26.3,
        "moe": 0.2,
        "lowReliability": false
      },
      "households": 7722646,
      "pctNoVehicle": {
        "value": 29.2,
        "moe": 0.1,
        "lowReliability": false
      },
      "pctThreePlusVehicles": {
        "value": 11.8,
        "moe": 0.1,
        "lowReliability": false
      },
      "medianHouseholdIncome": {
        "value": 85974,
        "moe": 402
      },
      "medianAge": {
        "value": 39.8,
        "moe": 0.1
      }
    },
    "nation": {
      "workers16plus": 159114094,
      "commutersNotWorkingFromHome": 135071605,
      "meanTravelMinutes": {
        "value": 26.4,
        "moe": 0,
        "lowReliability": false
      },
      "pct60MinPlus": {
        "value": 8.6,
        "moe": 0,
        "lowReliability": false
      },
      "pct90MinPlus": {
        "value": 2.7,
        "moe": 0,
        "lowReliability": false
      },
      "pctUnder15Min": {
        "value": 26,
        "moe": 0,
        "lowReliability": false
      },
      "pctDroveAlone": {
        "value": 68.8,
        "moe": 0.1,
        "lowReliability": false
      },
      "pctCarpooled": {
        "value": 8.5,
        "moe": 0,
        "lowReliability": false
      },
      "pctPublicTransit": {
        "value": 3.2,
        "moe": 0,
        "lowReliability": false
      },
      "pctCommuterRail": {
        "value": 0.3,
        "moe": 0,
        "lowReliability": false
      },
      "pctBus": {
        "value": 1.5,
        "moe": 0,
        "lowReliability": false
      },
      "pctWalked": {
        "value": 2.4,
        "moe": 0,
        "lowReliability": false
      },
      "pctBicycle": {
        "value": 0.4,
        "moe": 0,
        "lowReliability": false
      },
      "pctWorkedFromHome": {
        "value": 15.1,
        "moe": 0,
        "lowReliability": false
      },
      "pctLeaveBefore6am": {
        "value": 14.4,
        "moe": 0,
        "lowReliability": false
      },
      "pctLeaveBefore7am": {
        "value": 32.5,
        "moe": 0,
        "lowReliability": false
      },
      "households": 129227496,
      "pctNoVehicle": {
        "value": 8.4,
        "moe": 0,
        "lowReliability": false
      },
      "pctThreePlusVehicles": {
        "value": 21.9,
        "moe": 0,
        "lowReliability": false
      },
      "medianHouseholdIncome": {
        "value": 80734,
        "moe": 166
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      "medianAge": {
        "value": 38.9,
        "moe": 0.1
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    }
  },
  "research": {
    "researchedAt": "2026-09-17",
    "identity": {
      "officialName": "Lake Ronkonkoma",
      "placeType": "hamlet and census-designated place, named for the lake it surrounds",
      "parentTown": "Town of Brookhaven",
      "alsoIn": [
        "Town of Smithtown",
        "Town of Islip (south shore of the lake)"
      ],
      "formerNames": [
        {
          "name": "Lakeville / Lake Grove area names",
          "note": "An 1882 county history records that the names Lakeland, Lakeville and Ronkonkoma \"have been names applied to nearly the same\" locality, and describes the settlement reaching \"to the borders of Lake Ronkonkoma\" as Lake Grove.",
          "src": [
            5
          ]
        }
      ],
      "nameOrigin": null,
      "founded": null,
      "incorporated": null,
      "gnisId": null,
      "wikidataId": null
    },
    "quickFacts": [
      {
        "label": "Prior written notice law",
        "value": "Depends on which town's road: Town of Brookhaven Code § 84-1; Town of Smithtown Code Chapter 245, Article III, § 245-13; Town of Islip Code § 47A-3",
        "src": [
          11,
          12,
          13
        ]
      },
      {
        "label": "Courts",
        "value": "Sixth District Court (Brookhaven), 150 West Main Street, Patchogue; Fourth District Court (Smithtown); Fifth District Court (Islip), which sits at Ronkonkoma",
        "src": [
          14,
          15
        ]
      },
      {
        "label": "Lake depth",
        "value": "An 1882 county history recorded the lake's greatest depth as 72 feet and described it as circular with no visible outlet",
        "src": [
          6
        ]
      },
      {
        "label": "Main county road",
        "value": "CR 16 — Terry Road / Smithtown Boulevard / Portion Road / Horseblock Road, from NY 25 to Montauk Highway",
        "src": [
          9
        ]
      },
      {
        "label": "County park",
        "value": "Lake Ronkonkoma County Park, off Smithtown Boulevard along Lake Shore Road on the northern shore",
        "src": [
          8
        ]
      }
    ],
    "timeline": [
      {
        "date": "1955-04-21",
        "label": "Lake Ronkonkoma school district merges into Sachem",
        "text": "Voters from the Farmingville/Holtsville, Holbrook and Lake Ronkonkoma districts approved centralization into what became the Sachem Central School District.",
        "src": [
          19
        ]
      },
      {
        "date": "1964-01",
        "label": "Town justice courts replaced",
        "text": "The Suffolk County District Court became operational, with separate districts for Brookhaven, Smithtown and Islip — the three towns that meet at this lake.",
        "src": [
          14
        ]
      }
    ],
    "sections": [
      {
        "id": "geography",
        "heading": "The lake",
        "paragraphs": [
          "Lake Ronkonkoma is a kettle in the glacial outwash of central Long Island, and nineteenth-century observers described it in terms that still hold. The 1860 state gazetteer lists the fresh-water lakes of Suffolk County and names \"the principal of which is Lake Ronkonkoma, on the w. border of Brookhaven.\" Richard Bayles in 1874 recorded that it \"is one of the largest and most beautiful sheets of fresh water on the island,\" that \"The lake is about three miles in circumference, and lies some twenty feet below the average surface of the neighboring land,\" and that \"It is surrounded by a beach of white sand from which peculiarity it is said the Indian name it bears was derived.\" The 1882 county history added the measurement that is still quoted: \"This lake, which is circular in form and has no visible outlet,\" occupies one of the bowl-shaped depressions in the drift deposit, and \"Its greatest depth is 72 feet.\"[6] The same 1882 writer dismissed the lake's folklore in a single line, calling the traditional stories about it \"not worthy of repetition\" — a useful corrective to the legends that later accreted around the place.[6]",
          "The lake's most consequential feature, legally, is that it is a boundary. Bayles located it \"on the line of Brookhaven, Islip and Smithtown,\" and the 1882 history, writing from the Islip side, said \"Ronkonkoma Lake lies in this town at its northeastern\" corner.[6]"
        ]
      },
      {
        "id": "history",
        "heading": "History",
        "paragraphs": [
          "The settlement around the lake went under several names at once. An 1882 history describes a continuous settlement of about three hundred people extending \"to the borders of Lake Ronkonkoma\" and called Lake Grove, and notes that the names Lakeland, Lakeville and Ronkonkoma \"have been names applied to nearly the same\" locality.[5] The lake also gave its name to a temperance lodge: \"Ronkonkoma Division, No. 306, Sons of Temperance was organized here February 19th 1868, with 13 charter members,\" surrendering its charter on April 6, 1876.[5]",
          "In the twentieth century the lakeside communities were folded into a single school district. The Sachem Central School District records that \"On April 21, 1955, citizens from Farmingville/Holtsville, Holbrook, and Lake Ronkonkoma school districts voted to form a central school district, later named Sachem,\" a response to rapid population growth in Brookhaven and Islip towns; the district's new board seated three members from each of the three predecessor districts.[19] Sachem still describes its territory as reaching \"east on the beaches of Lake Ronkonkoma.\"[19]"
        ]
      },
      {
        "id": "roads",
        "heading": "How the roads got here",
        "paragraphs": [
          "The east-west road along the lake is county, not state. Suffolk County's roads list carries CR 16 as \"Terry Road / Smithtown Boulevard / Portion Road / Horseblock Road,\" running from \"NYS RT 25, Middle Country Rd to CR 80, Montauk Hwy\" — a single county route that changes name four times as it crosses the lake district and runs on into Farmingville and Yaphank.[9]",
          "The north-south connection is CR 93, listed by the county as \"Lakeland Avenue / Ocean Avenue / Rosevale Avenue\" and terminating at Portion Road.[16] Rosevale Avenue is also the eastern end of one of the most historically significant roads on Long Island: the county's list gives CR 67 as \"Vanderbilt Parkway / Motor Parkway,\" running from \"NYS RT 231, Deer Park Rd to CR 93, Rosevale Ave.\"[17] In other words, the surviving county-maintained remnant of William K.",
          "NY 25, Middle Country Road, is the state route along the north of the lake district; the New York State Department of Transportation's touring-route book describes NY 25 running east through \"Floral Park, Mineola, South Huntington, Smithtown, Branch, Coram, Riverhead.\"[18] On the local grid, a 2022 Suffolk County road-closure notice circulated by the Holbrook Fire Department names the loop that rings the lake's south and east — \"Rosevale Avenue from Pond Road to Southern Boulevard,\" \"Smithtown Boulevard/Portion Road from Rosevale Avenue to Ronkonkoma Avenue\" and \"Lakeshore Road/Pond Road from Portion Road to Church Street.\"[20]"
        ]
      },
      {
        "id": "law",
        "heading": "Law and legal history",
        "paragraphs": [
          "Which municipality you sue over a pothole here depends on which side of the lake you were hurt on, and each of the three towns has enacted a different prior-written-notice law. The Town of Brookhaven's Code, Chapter 84, is titled \"Notice of Defective or Dangerous Conditions\"; § 84-1 provides that \"No civil action shall be commenced against the Town of Brookhaven or the Superintendent of Highways for damages or injuries to persons\" or property caused by a defective highway, street, bridge, culvert, crosswalk or pedestrian walkway unless written notice, \"identifying with particularity the specific nature and location\" of the defect, was given beforehand by a person with firsthand knowledge to the Town Clerk or Superintendent of Highways by personal service or registered or certified mail.[11] The Town of Smithtown's equivalent sits in Chapter 245, \"Streets and Sidewalks,\" whose Article III is \"Civil Claims Notice\" and whose \"§ 245-13 Written notice of defects required\" carries the rule.[12] The Town of Islip's version, § 47A-3, requires that notice \"was actually given to the Town Clerk or Commissioner of Public Works.\"[13] The three provisions differ in who must be served and how — Brookhaven alone demands firsthand knowledge and service by mail or in person — so the identity of the road's owner is the first question in any Lake Ronkonkoma road-defect claim.[11][12][13]",
          "The court system splits along the same lines. The Unified Court System's history of the Suffolk County District Court records that the court \"became operational in January 1964,\" replacing the town justice courts of the five western towns, and that \"Fourth District Court encompasses the town of Smithtown,\" \"Fifth District Court encompasses the town of Islip\" and \"Sixth District Court encompasses the town of Brookhaven.\"[14] The Sixth District sits at \"Suffolk County Sixth District Court 150 West Main Street Patchogue NY 11772,\" where it hears the \"Brookhaven Town Ordinance calendars\" — the town-code prosecutions that most often reach lakeside property owners.[15] Islip-side ordinance and landlord-tenant matters are heard at the Ronkonkoma courthouse on Veterans Memorial Highway.[21]"
        ]
      },
      {
        "id": "government",
        "heading": "Government, courts and policing",
        "paragraphs": [
          "There is no village government at Lake Ronkonkoma; the hamlet is unincorporated and its services come from the three towns and from Suffolk County. On the Brookhaven side, the Town's Highway Department — which the Town describes as \"one of the largest in the State of New York\" — maintains the local streets, its Superintendent \"charged with maintaining more than 3,500 lane miles of roadway within the Town of Brookhaven.\"[22]",
          "Policing is by the Suffolk County Police Department, which serves all three towns here. The Sixth Precinct \"protects and serves several hamlets and incorporated villages within the Town of Brookhaven (North)\" from 400 Middle Country Road in Selden; the Fourth Precinct's front desk is at \"727 Veterans Memorial Hwy, Smithtown\"; the Fifth Precinct, at \"125 Waverly Ave, Patchogue,\" covers southern Brookhaven and eastern Islip.[23][24][25]",
          "The lake's own institutions are local and volunteer. The Town of Brookhaven's list of historic sites gives the Lake Ronkonkoma Historical Society at 328 Hawkins Avenue, Lake Ronkonkoma, with a museum open Saturdays, and records that the Society owns and operates the Fitz-Greene Hallock House at 3269 Pond Road — \"14-room farmhouse set on 31/2 acres. Annual House Tour, Last Saturday in September or by appointment.\"[26] Suffolk County maintains Lake Ronkonkoma County Park, which the county says \"is located off Smithtown Boulevard along Lake Shore Road, at the northern shore of Lake Ronkonkoma,\" with a fishing area, ball fields, handball and basketball courts, an accessible playground and a picnic area.[8]"
        ]
      }
    ],
    "legalCases": [],
    "landmarks": [
      {
        "name": "Fitz-Greene Hallock House, 3269 Pond Road",
        "designation": "14-room farmhouse on about 3. 5 acres, owned and operated by the Lake Ronkonkoma Historical Society",
        "src": [
          26
        ]
      },
      {
        "name": "Lake Ronkonkoma County Park",
        "designation": "Suffolk County park on the northern shore, off Smithtown Boulevard along Lake Shore Road",
        "src": [
          8
        ]
      },
      {
        "name": "Lake Ronkonkoma Historical Society museum, 328 Hawkins Avenue",
        "designation": "Local historical society museum; collections include Maude Adams memorabilia",
        "src": [
          26
        ]
      }
    ],
    "notableFacts": [
      {
        "text": "An 1882 county history put Lake Ronkonkoma's greatest depth at 72 feet and described it as circular, with no visible outlet.",
        "src": [
          6
        ]
      },
      {
        "text": "The county-maintained remnant of the Long Island Motor Parkway, signed CR 67, ends at Rosevale Avenue in Lake Ronkonkoma.",
        "src": [
          17
        ]
      },
      {
        "text": "Ronkonkoma Division No. 306 of the Sons of Temperance was organized at the lake on February 19, 1868 with 13 charter members, and surrendered its charter on April 6, 1876.",
        "src": [
          5
        ]
      },
      {
        "text": "The Sachem Central School District was created on April 21, 1955 when voters in the Lake Ronkonkoma, Holbrook and Farmingville/Holtsville districts approved centralization.",
        "src": [
          19
        ]
      },
      {
        "text": "The Lake Ronkonkoma Historical Society runs the 14-room Fitz-Greene Hallock House at 3269 Pond Road on about three and a half acres.",
        "src": [
          26
        ]
      }
    ],
    "sources": [
      {
        "id": 5,
        "title": "History of Suffolk County, New York (Lake Grove; Ronkonkoma Division of the Sons of Temperance)",
        "publisher": "W. W. Munsell & Co., via Internet Archive",
        "url": "https://archive.org/download/cu31924028834848/cu31924028834848_djvu.txt",
        "year": "1882",
        "type": "book"
      },
      {
        "id": 6,
        "title": "History of Suffolk County, New York (Town of Islip: Ronkonkoma Lake)",
        "publisher": "W. W. Munsell & Co., via Internet Archive",
        "url": "https://archive.org/download/cu31924028834848/cu31924028834848_djvu.txt",
        "year": "1882",
        "type": "book"
      },
      {
        "id": 8,
        "title": "Lake Ronkonkoma County Park",
        "publisher": "Suffolk County Department of Parks, Recreation and Conservation",
        "url": "https://www.suffolkcountyny.gov/Departments/Parks/Our-Parks/Lake-Ronkonkoma-County-Park",
        "year": "2026",
        "type": "government"
      },
      {
        "id": 9,
        "title": "Suffolk County Roads List (CR 16)",
        "publisher": "Suffolk County Department of Public Works",
        "url": "https://www.suffolkcountyny.gov/Portals/0/formsdocs/publicworks/PDF/Suffolk%20County%20Roads%20List.pdf",
        "year": "2020",
        "type": "government"
      },
      {
        "id": 11,
        "title": "Code of the Town of Brookhaven § 84-1, Written notice required (Ch. 84, Notice of Defective or Dangerous Conditions)",
        "publisher": "Town of Brookhaven / eCode360 (archived)",
        "url": "https://web.archive.org/web/20240524200857/https://ecode360.com/8596414",
        "year": "2024",
        "type": "government"
      },
      {
        "id": 12,
        "title": "Code of the Town of Smithtown, Chapter 245 (Streets and Sidewalks), Article III Civil Claims Notice",
        "publisher": "Town of Smithtown / eCode360 (archived)",
        "url": "https://web.archive.org/web/20170513215335/http://ecode360.com/15100858",
        "year": "2017",
        "type": "government"
      },
      {
        "id": 13,
        "title": "Code of the Town of Islip § 47A-3, Liability of Town",
        "publisher": "Town of Islip / eCode360 (archived)",
        "url": "https://web.archive.org/web/20160925071405/http://ecode360.com/6509628",
        "year": "2016",
        "type": "government"
      },
      {
        "id": 14,
        "title": "History and Organization of Suffolk District Court",
        "publisher": "New York State Unified Court System (archived)",
        "url": "https://web.archive.org/web/20221210061258/https://ww2.nycourts.gov/courts/10jd/suffolk/dist/history.shtml",
        "year": "2022",
        "type": "court"
      },
      {
        "id": 15,
        "title": "Brookhaven Town Ordinance — Suffolk County Sixth District Court",
        "publisher": "New York State Unified Court System (archived)",
        "url": "https://web.archive.org/web/20210812032358/http://ww2.nycourts.gov/courts/10jd/suffolk/dist/6townordinance.shtml",
        "year": "2021",
        "type": "court"
      },
      {
        "id": 16,
        "title": "Suffolk County Roads List (CR 93)",
        "publisher": "Suffolk County Department of Public Works",
        "url": "https://www.suffolkcountyny.gov/Portals/0/formsdocs/publicworks/PDF/Suffolk%20County%20Roads%20List.pdf",
        "year": "2020",
        "type": "government"
      },
      {
        "id": 17,
        "title": "Suffolk County Roads List (CR 67)",
        "publisher": "Suffolk County Department of Public Works",
        "url": "https://www.suffolkcountyny.gov/Portals/0/formsdocs/publicworks/PDF/Suffolk%20County%20Roads%20List.pdf",
        "year": "2020",
        "type": "government"
      },
      {
        "id": 18,
        "title": "Official Description of Highway Touring Routes ... (NY 25)",
        "publisher": "New York State Department of Transportation",
        "url": "https://www.dot.ny.gov/divisions/operating/oom/transportation-systems/repository/2017%20tour-bk.pdf",
        "year": "2017",
        "type": "government"
      },
      {
        "id": 19,
        "title": "About Us — Sachem Central School District",
        "publisher": "Sachem Central School District",
        "url": "https://www.sachem.edu/about-us",
        "year": "2026",
        "type": "government"
      },
      {
        "id": 20,
        "title": "Road closure notice (Suffolk County Department of Fire, Rescue and Emergency Services, on behalf of SCPD)",
        "publisher": "Holbrook Fire Department",
        "url": "https://www.holbrookfd.org/",
        "year": "2022",
        "type": "institution"
      },
      {
        "id": 21,
        "title": "Mass Transit & Road Directions, Ronkonkoma Courthouse",
        "publisher": "New York State Unified Court System (archived)",
        "url": "https://web.archive.org/web/20250423042234/https://ww2.nycourts.gov/courts/10jd/suffolk/dist/ronkonkoma.shtml",
        "year": "2025",
        "type": "court"
      },
      {
        "id": 22,
        "title": "Highway Department",
        "publisher": "Town of Brookhaven",
        "url": "https://www.brookhavenny.gov/173/Highway-Department",
        "year": "2026",
        "type": "government"
      },
      {
        "id": 23,
        "title": "Sixth Precinct",
        "publisher": "Suffolk County Police Department",
        "url": "https://www.suffolkpd.org/Precincts-and-Specialized-Units/Precincts/Sixth-Precinct",
        "year": "2026",
        "type": "government"
      },
      {
        "id": 24,
        "title": "Contact Us (Precinct Commanding Officer addresses)",
        "publisher": "Suffolk County Police Department",
        "url": "https://www.suffolkpd.org/Contact-Us",
        "year": "2026",
        "type": "government"
      },
      {
        "id": 25,
        "title": "Phone Directory — Precinct Front Desks",
        "publisher": "Suffolk County Police Department",
        "url": "https://www.suffolkpd.org/Contact-Us/Phone-Directory",
        "year": "2026",
        "type": "government"
      },
      {
        "id": 26,
        "title": "Historic Sites in Town (Lake Ronkonkoma Historical Society; Fitz-Greene Hallock House)",
        "publisher": "Town of Brookhaven",
        "url": "https://www.brookhavenny.gov/529/Historic-Sites-in-Town",
        "year": "2026",
        "type": "government"
      },
      {
        "id": 27,
        "title": "Fifth Precinct",
        "publisher": "Suffolk County Police Department",
        "url": "https://www.suffolkpd.org/Precincts-and-Specialized-Units/Precincts/Fifth-Precinct",
        "year": "2026",
        "type": "government"
      },
      {
        "id": 28,
        "title": "New York State Trauma Centers (Suffolk County rows)",
        "publisher": "New York State Department of Health",
        "url": "https://www.health.ny.gov/professionals/ems/state_trauma/trauma2.htm",
        "year": "2025",
        "type": "government"
      },
      {
        "id": 29,
        "title": "NYU Langone Hospital—Suffolk",
        "publisher": "NYU Langone Health",
        "url": "https://www.nyulangone.org/locations/nyu-langone-hospital-suffolk",
        "year": "2026",
        "type": "institution"
      },
      {
        "id": 30,
        "title": "10th JD — Suffolk County",
        "publisher": "New York State Unified Court System (archived)",
        "url": "https://web.archive.org/web/20250207011125/https://ww2.nycourts.gov/courts/10jd/suffolk/index.shtml",
        "year": "2024",
        "type": "court"
      }
    ]
  },
  "dataSources": {
    "census2020": {
      "name": "U.S. Census Bureau, TIGERweb — 2020 Census tabulation geography (POP100, HU100, AREALAND)",
      "url": "https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/tigerWMS_Census2020/MapServer",
      "retrieved": "2026-09-17"
    },
    "acs": {
      "name": "U.S. Census Bureau, American Community Survey 2020–2024 5-Year Estimates, tables B08303, B08013, B08301, B08302, B08201, B19013, B01002",
      "url": "https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/",
      "period": "2020–2024",
      "retrieved": "2026-09-17",
      "note": "Survey estimates with 90% margins of error. lowReliability = coefficient of variation above 30%."
    },
    "fars": {
      "name": "National Highway Traffic Safety Administration, Fatality Analysis Reporting System (FARS), 2010–2024 national files",
      "url": "https://www.nhtsa.gov/file-downloads?p=nhtsa/downloads/FARS/",
      "retrieved": "2026-09-17",
      "preliminaryYears": [
        2024
      ],
      "note": "Crashes on public trafficways in which a person died within 30 days. No personal identifiers. Placed by reported coordinates into 2020 Census boundaries."
    },
    "nys": {
      "name": "New York State Department of Motor Vehicles, Motor Vehicle Crashes — Case Information: Four Year Window",
      "url": "https://data.ny.gov/Transportation/Motor-Vehicle-Crashes-Case-Information-Four-Year-W/e8ky-4vqe",
      "period": "2021–2024",
      "retrieved": "2026-09-17",
      "note": "Police-reported crashes coded to a town, city or village by the reporting agency. Hamlets are not coded; hamlet pages show the parent town."
    }
  }
}
