Founded in 1816, Oswego County is one of 62 counties in the state of New York. Historically, Oswego County was oneida County and Onondaga County. The city of Oswego is the county seat. With FIPS code of 75, Oswego County has a population of 117,387 and area of 1,312 square miles (3,398 km2).
List of all cities in Oswego County, NY alphabetically
| City/Town | Postal Code | Area Code |
| Altmar, NY | 13302 | 315 |
| Bernhards Bay, NY | 13028 | 315 |
| Bowens Corners, NY | 13069 | 315 |
| Boylston, NY | 13083 | 315 |
| Bundyville, NY | 13126 | 315 |
| Central Sq, NY | 13036 | 315 |
| Central Square, NY | 13036 | 315 |
| Cleveland, NY | 13042 | 315 |
| Colosse, NY | 13131 | 315 |
| Constantia, NY | 13044 | 315 |
| Demster, NY | 13126 | 315 |
| Fairdale, NY | 13074 | 315 |
| Fernwood, NY | 13142 | 315 |
| Fruit Valley, NY | 13126 | 315 |
| Fulton, NY | 13069 | 315 |
| Furniss, NY | 13126 | 315 |
| Furniss Station, NY | 13126 | 315 |
| Gayville, NY | 13044 | 315 |
| Granby, NY | 13069 | 315 |
| Granby Center, NY | 13069 | 315 |
| Hannibal, NY | 13074 | 315 |
| Hannibal Center, NY | 13074 | 315 |
| Hastings, NY | 13076 | 315 |
| Hinmansville, NY | 13135 | 315 |
| Howardville, NY | 13302 | 315 |
| Kasoag, NY | 13302 | 315 |
| Lacona, NY | 13083 | 315 |
| Lycoming, NY | 13093 | 315 |
| Mallory, NY | 13103 | 315 |
| Maple View, NY | 13107 | 315 |
| Mexico, NY | 13114 | 315 |
| Minetto, NY | 13115 | 315 |
| New Haven, NY | 13121 | 315 |
| North Hannibal, NY | 13126 | 315 |
| Orwell, NY | 13426 | 315 |
| Oswego, NY | 13126 | 315 |
| Oswego Center, NY | 13126 | 315 |
| Palermo, NY | 13069 | 315 |
| Parish, NY | 13107 | 315 |
| 13131 | 315 | |
| Pennellville, NY | 13132 | 315 |
| Phoenix, NY | 13135 | 315 |
| Pine Meadows, NY | 13302 | 315 |
| Port Ontario, NY | 13142 | 315 |
| Pulaski, NY | 13142 | 315 |
| Redfield, NY | 13437 | 315 |
| Ricard, NY | 13302 | 315 |
| Richland, NY | 13144 | 315 |
| Sandy Creek, NY | 13145 | 315 |
| Schroeppel, NY | 13135 | 315 |
| Scriba, NY | 13126 | 315 |
| Scriba Center, NY | 13126 | 315 |
| Seneca Hill, NY | 13126 | 315 |
| Smartville, NY | 13083 | 315 |
| South Albion, NY | 13302 | 315 |
| South Hannibal, NY | 13074 | 315 |
| Southwest Oswego, NY | 13126 | 315 |
| Volney, NY | 13069 | 315 |
| West Monroe, NY | 13167 | 315 |
| Williamstown, NY | 13493 | 315 |