Onondaga County, New York

County seat: Syracuse · Population 466,584 (2025) · 778 sq mi

Onondaga County is the 11th most populous of New York's 62 counties, with 466,584 people (2025 estimate). Its county seat is Syracuse. The map shows its 16 cities and towns and the 4 neighboring counties.

Map of Onondaga County, New York with cities, towns and the county boundary
Onondaga County, New York with its cities and towns, unincorporated communities (CDPs) and neighboring counties. Boundaries: U.S. Census Bureau, 2025. Free to use with attribution (CC BY 4.0).
Download PDF (Letter) 150 KBPNG image 125 KBNew York county map

Onondaga County facts

County seat
Syracuse
Population (2025 estimate)
466,584 −2.1% since 2020
Land area
778 sq mi 27th largest of 62
Water area
27 sq mi
Population density
599 per sq mi
Established
1794
Named after
Onondaga North American indigenous people
Largest city
Syracuse 144,896
Median household income
$76,945
Cities and towns
16 plus 13 CDPs
ZIP codes
58
Time zone
Eastern
FIPS code
36067

Cities and towns in Onondaga County

Onondaga County has 16 incorporated cities, towns and villages. Populations count the people living inside Onondaga County; cities that cross a county line also list the other counties.

NameTypePopulation 2025Also in
Syracuse (county seat)City144,896
BaldwinsvilleVillage7,582
North SyracuseVillage6,773
SolvayVillage6,427
ManliusVillage4,583
FayettevilleVillage4,126
MinoaVillage3,624
East SyracuseVillage2,973
SkaneatelesVillage2,503
LiverpoolVillage2,231
MarcellusVillage1,761
CamillusVillage1,258
JordanVillage1,194
ElbridgeVillage950
TullyVillage890
FabiusVillage321

Unincorporated communities (CDPs)

Census-designated places are communities without their own city government; the county provides their services.

CommunityPopulationAlso in
DeWitt11,060
Fairmount9,724
Radisson6,676
Mattydale5,971
Westvale5,212
Lyncourt4,095
Galeville3,962
Village Green3,687
Brewerton3,339Oswego County
Lakeland2,322
Nedrow2,029
Seneca Knolls2,001
Bridgeport1,134Madison County

ZIP codes in Onondaga County

58 ZIP codes reach into Onondaga County. ZIP codes ignore county lines, so some also cover a neighboring county.

Population of Onondaga County, 2020–2025

Onondaga County shrank by 9,929 people (−2.1%) between April 2020 and July 2025: 1,269 more deaths than births and a net loss of 8,426 people from migration.

Year (July 1)Population
2020475,429
2021471,829
2022469,910
2023468,524
2024468,173
2025466,584

Neighboring counties

Printable Onondaga County map

The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.

Paste this code to embed the map on your site:

Sources

Back to the New York county map with all 62 counties. Found an error? Tell us.