Islip, New York

Islip, New York
Town of Islip
Islip Town Hall in 2012
Motto: 
Fide sed cui vide
Location of Islip in Suffolk County, New York
Coordinates: 40°45′24″N 73°11′56″W / 40.75667°N 73.19889°W / 40.75667; -73.19889
Country United States
State New York
CountySuffolk
Incorporated1683
Named afterIslip, Northamptonshire
Government
  TypeCivil Township
  SupervisorAngie M. Carpenter (R)
Area
  Total
162.98 sq mi (422.10 km2)
  Land103.80 sq mi (268.84 km2)
  Water59.17 sq mi (153.26 km2)
Elevation
7 ft (2 m)
Population
 (2020)
  Total
339,938
  Density3,275.9/sq mi (1,264.5/km2)
Time zoneUTC-5 (Eastern (EST))
  Summer (DST)UTC-4 (EDT)
ZIP code
11705, 11706, 11716, 11717, 11718, 11722, 11730, 11739, 11749, 11751, 11752, 11760, 11769, 11770, 11782, 11795, 11796, 11702 (part), 11729 (part), 11742 (part), 11741 (part)
Area code(s)631, 934
FIPS code36-38000
GNIS feature ID0979097
Websitewww.islipny.gov

Islip (/ˈslɪp/ EYE-slip) is a town in Suffolk County, New York, United States, on the South Shore of Long Island. The population was 339,938 at the time of the 2020 census, making it the fourth most populous city or town in the New York metropolitan area. The Town of Islip also contains a smaller, unincorporated hamlet and census-designated place named Islip, which serves as the town seat.