Cities, Towns, Neighborhoods & Other Populated Places in Onondaga County.
| City Name | Title | County | Population |
|---|---|---|---|
| Syracuse | County seat of Onondaga County, New York, United States | 142,327 | |
| Clay | Town of the United States | 59,250 | |
| Cicero | Town in Onondaga County, New York, USA | 30,721 | |
| De Witt | Town in Onondaga County, New York, USA | 25,041 | |
| Lysander | City in Onondaga County, New York, United States of America | 22,896 | |
| Van Buren | Town in New York, United States | 13,376 | |
| Fairmount | Town in Indiana, United States | 10,224 | |
| Baldwinsville | Village in Onondaga County, New York | 7,822 | |
| Pompey | Town in Onondaga County, New York, United States | 7,276 | |
| North Syracuse | Village in New York, USA | 6,628 | |
| Mattydale | Census-designated place in Onondaga County, New York | 6,446 | |
| Solvay | Village located in Onondaga County, New York, United States of America | 6,234 | |
| Westvale | Census designated place | 4,963 | |
| LaFayette | City in Onondaga County, New York, United States of America | 4,804 | |
| Kirkville | 4,685 | ||
| Galeville | Census-designated place in Onondaga County, New York | 4,617 | |
| Manlius | Village in Bureau County, Illinois, United States | 4,434 | |
| Lyncourt | Census-designated place in Onondaga County, New York | 4,250 | |
| Fayetteville | Village in Onondaga County, New York | 4,044 | |
| Brewerton | City in New York, United States of America | 4,029 | |
| Village Green | Common open area within a settlement | 3,891 | |
| Minoa | Village in Onondaga County, New York | 3,415 | |
| East Syracuse | City in Onondaga County, New York, United States of America | 2,920 | |
| Lakeland | 2,786 | ||
| Otisco | Valley in Onondaga County, United States of America | 2,529 | |
| Skaneateles | Town in Onondaga County, New York, United States | 2,465 | |
| Nedrow | Census-designated place in Onondaga County, New York | 2,244 | |
| Liverpool | Village in Onondaga County, New York, United States | 2,204 | |
| Seneca Knolls | Census-designated place in Onondaga County, New York | 2,011 | |
| Marcellus | Town in Onondaga County, New York, United States | 1,717 | |
| Spafford | Town in New York | 1,643 | |
| Peru | 1,479 | ||
| Amboy | City in Oswego County, New York, United States of America | 1,311 | |
| Jordan | Village in New York, United States | 1,302 | |
| Camillus | Town in New York | 1,195 | |
| Elbridge | Town in Onondaga County, New York, United States | 998 | |
| Tully | City in Onondaga County, New York, United States of America | 853 | |
| Fabius | City in New York, United States of America | 332 |