Long Island
Islip, New York
Islip is a town in Suffolk County, in New York's Long Island region, home to about 340,000 people as of the 2020 census.
Ocean beaches, the Hamptons, lighthouses, and North Fork vineyards east of the city. Islip sits in that part of the state.
- Type
- Town
- County
- Suffolk
- Region
- Long Island
- Population (2020)
- 339,938
Local Almanac
Notes in and around Islip
Short, sourced notes tied to this place, its county, or nearby communities.
This place · History & Culture
Islip's Bay Story Runs Inland
Islip's identity includes Secatogue villages, William Nicoll's 1683 purchase, Blue Point oysters, bay life, and estate history.
Read this note ->This place · History & Culture
Islip's Historic Trail Links Estates, Airfields, and Bay Villages
Islip's Historic Trail ties the town's identity to South Shore estates, airfields, maritime museums, and older hamlet landmarks.
Read this note ->This place · The Outdoors
Bayard Cutting Arboretum gives Great River an estate landscape
Bayard Cutting Arboretum ties Suffolk to a river estate, public gardens, and the quieter South Shore landscape around Great River.
Read this note ->This place · The Outdoors
Connetquot River State Park keeps the old sportsmen-club landscape readable
Connetquot River State Park Preserve explains part of Islip through river ecology, preserved grounds, and Long Island sporting-club history.
Read this note ->This place · The Outdoors
Heckscher State Park gives Islip a bayfront commons
Heckscher State Park gives Islip Great South Bay access, fields, woods, and state-park scale.
Read this note ->This place · Home & Property
Islip Building Records Matter Before You Renovate
Islip's Building Division explains electronic filing, permit intake, inspections, FOIL, and records close-out for permits and certificates.
Read this note ->This place · Rules & Licenses
Islip Rentals Need the Town Permit Route
In Suffolk's Town of Islip, a rental should be checked against the town rental occupancy permit process before signing.
Read this note ->This place · History & Culture
Long Island Maritime Museum keeps West Sayville close to the bay
Long Island Maritime Museum gives West Sayville and Islip small-craft memory, bay work, boatbuilding, and South Shore maritime interpretation.
Read this note ->Suffolk County · Home & Property
Suffolk Owners Can Use the Clerk's Watch List
Suffolk's Homeowner Watch List can email owners when land-record filings show up for a registered property.
Read this note ->Property tax snapshot
Roughly $5–$24 per $1,000
Combined full-value rate — county + town/city + school district, per $1,000 of market value (FY2025). On a $300,000 home that's about $1,583–$7,078 a year before the STAR break.
A planning estimate, not a bill. Your exact rate depends on your school district and any village. Confirm with the assessor.
Statewide links
Statewide starting points.
Good to know
- • Your assessed value usually isn't your market value — ask for the equalization rate.
- • Register for STAR; new applicants generally receive a credit instead of an automatic exemption on the bill.
- • Outside the cities, check the well, the septic, and the FEMA flood map before you buy.
Nearby
Nearby places
East Islip
Hamlet (CDP) · Suffolk County · 13,931
Great River
Hamlet (CDP) · Suffolk County · 2,005
Islip
Hamlet (CDP) · Suffolk County · 18,418
Islip Terrace
Hamlet (CDP) · Suffolk County · 5,323
Bay Shore
Hamlet (CDP) · Suffolk County · 29,244
North Great River
Hamlet (CDP) · Suffolk County · 4,266
Tax rates: NYS Dept of Taxation & Finance (ORPTS), Real Property Tax Rates and Levy Data by Municipality, data.ny.gov dataset iq85-sdzs. (FY2025). Population: U.S. Census 2020. Reviewed June 2026. Source data ->
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