Onondaga County
Also known as Onondaga County, New York, Onondaga County, NY
county in New York, United States
Key facts
- Country
- United States
- State
- New York
- Named after
- Onondaga people
- Seat
- Syracuse
- Largest city
- Syracuse
- County executive
- J. Ryan McMahon II ( R )
- Total
- 806 sq mi (2,090 km )
- Land
- 778 sq mi (2,020 km )
- Water
- 27 sq mi (70 km ) 3.4%
- Estimate 2025
- 466,584
- Density
- 600/sq mi (230/km )
- Time zone
- UTC−5 ( Eastern )
- Summer dst
~18 min read
Article
Onondaga County (/ˌɑːnənˈdɑːɡə/ AHN-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.