Tompkins County, New York

Tompkins County
Location within the U.S. state of New York
New York's location within the U.S.
Coordinates: 42°27′N 76°28′W / 42.45°N 76.47°W / 42.45; -76.47
Country United States
State New York
FoundedApril 17, 1817
Named afterDaniel D. Tompkins
SeatIthaca
Largest CityIthaca
Area
  Total
492 sq mi (1,270 km2)
  Land475 sq mi (1,230 km2)
  Water17 sq mi (40 km2)  3.4%
Population
 (2020)
  Total
105,740
  Density222.8/sq mi (86.0/km2)
DemonymTompkins Countyan
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
ZIP Codes
13053, 13062, 13068, 13073, 13102, 13736, 14817, 13864, 14850, 14851, 14852, 14853, 14854, 14867, 14881, 14882, 14883, 14886
Area code607
Congressional district19th
Websitetompkinscountyny.gov

Tompkins County is a county located in the U.S. state of New York. As of the 2020 census, the population was 105,740. The county seat is Ithaca. The name is in honor of Daniel D. Tompkins, who served as Governor of New York and Vice President of the United States. The county is part of the Southern Tier region of the state.

Tompkins County comprises the Ithaca Metropolitan Statistical Area. It is home to Cornell University, Ithaca College and Tompkins Cortland Community College.