New York Gazetteer
The 315 area code is used by SOME cities and towns in these Counties:
| Cayuga County | Cities & Towns | ZIP Codes | Features |
| Chenango County | Cities & Towns | ZIP Codes | Features |
| Cortland County | Cities & Towns | ZIP Codes | Features |
| Fulton County | Cities & Towns | ZIP Codes | Features |
| Hamilton County | Cities & Towns | ZIP Codes | Features |
| Herkimer County | Cities & Towns | ZIP Codes | Features |
| Jefferson County | Cities & Towns | ZIP Codes | Features |
| Lewis County | Cities & Towns | ZIP Codes | Features |
| Madison County | Cities & Towns | ZIP Codes | Features |
| Oneida County | Cities & Towns | ZIP Codes | Features |
| Onondaga County | Cities & Towns | ZIP Codes | Features |
| Ontario County | Cities & Towns | ZIP Codes | Features |
| Oswego County | Cities & Towns | ZIP Codes | Features |
| Otsego County | Cities & Towns | ZIP Codes | Features |
| Saint Lawrence County | Cities & Towns | ZIP Codes | Features |
| Seneca County | Cities & Towns | ZIP Codes | Features |
| Wayne County | Cities & Towns | ZIP Codes | Features |
| Yates County | Cities & Towns | ZIP Codes | Features |
