Onondaga County, New York

Onondaga County
Onondaga County Courthouse at Columbus Circle in Syracuse
Location within the U.S. state of New York
New York's location within the U.S.
Coordinates: 43°01′N 76°12′W / 43.01°N 76.2°W / 43.01; -76.2
Country United States
State New York
Founded1794
Named afterOnondaga people
SeatSyracuse
Largest citySyracuse
Government
  County ExecutiveJ. Ryan McMahon II (R)
Area
  Total
806 sq mi (2,090 km2)
  Land778 sq mi (2,020 km2)
  Water27 sq mi (70 km2)  3.4%
Population
 (2020)
  Total
476,516
  Density600/sq mi (200/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional district22nd
Websiteongov.net

Onondaga County (/ˌɒnənˈdɑːɡə/ ON-ən-DAH-gə) is a county in the U.S. state of New York. As of the 2020 census, the population was 476,516. The county seat is Syracuse. The county is part of the Central New York region of the state.

Onondaga County is the core of the Syracuse Metropolitan Statistical Area.