| Locality | Post Code |
|---|---|
| Onon Hill, Onondaga | 13215 |
| Onondaga Nation, Onondaga | 13120 |
| Otisco, Onondaga | 13159 |
| Otisco Valley, Onondaga | 13110 |
| Plainville, Onondaga | 13137 |
| Pompey, Onondaga | 13138 |
| Radisson, Onondaga | 13027 |
| Rockwell Springs, Onondaga | 13120 |
| Salina, Onondaga | 13088 |
| Sentinel Heights, Onondaga | 13078 |
| Skaneateles, Onondaga | 13152 |
| Skaneateles Falls, Onondaga | 13153 |
| Solvay, Onondaga | 13209 |
| South Onondaga, Onondaga | 13120 |
| Split Rock, Onondaga | 13031 |
| Syracuse, Onondaga | 13202, 13203, 13204, 13205, 13206, … |
| Taunton, Onondaga | 13219 |
| Tully, Onondaga | 13159 |
| Van Buren, Onondaga | 13027 |
| Vesper, Onondaga | 13159 |
| Warners, Onondaga | 13164 |
| Westvale, Onondaga | 13219 |