Onondaga County is a district of New York.
Boundaries: United States Census Bureau, MAF/TIGER Database (https://www.census.gov/geographies/mapping-files/time-series/geo/carto-boundary-file.html) via geoBoundaries, public domain
| City of Syracuse | Syracuse | 145 k |
| Town of Camillus | no seat recorded | 25 k |
| Town of Cicero | no seat recorded | 32 k |
| Town of Clay | no seat recorded | 60 k |
| Town of De Witt | no seat recorded | 26 k |
| Town of Elbridge | no seat recorded | 6 k |
| Town of Fabius | no seat recorded | 2 k |
| Town of Geddes | no seat recorded | 17 k |
| Town of LaFayette | no seat recorded | 5 k |
| Town of Lysander | no seat recorded | 23 k |
| Town of Manlius | no seat recorded | 32 k |
| Town of Marcellus | no seat recorded | 6 k |
| Town of Onondaga | no seat recorded | 23 k |
| Town of Otisco | no seat recorded | 3 k |
| Town of Pompey | no seat recorded | 7 k |
| Town of Salina | no seat recorded | 33 k |
| Town of Skaneateles | no seat recorded | 7 k |
| Town of Spafford | no seat recorded | 2 k |
| Town of Tully | no seat recorded | 3 k |
| Town of Van Buren | no seat recorded | 13 k |
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