Founded in 1812, Putnam County is one of 62 counties in the state of New York. Historically, Putnam County was formed from Dutchess County. The city of Carmel Hamlet is the county seat. With FIPS code of 79, Putnam County has a population of 97,936 and area of 246 square miles (637 km2).
List of all cities in Putnam County, NY alphabetically
| City/Town | Postal Code | Area Code |
| Adams Corners, NY | 10579 | 845 |
| Brewster, NY | 10509 | 845 |
| Carmel, NY | 10512 | 845 |
| Cold Spring, NY | 10516 | 845 |
| Crofts Corners, NY | 10579 | 845 |
| Garrison, NY | 10524 | 845 |
| Kent Lakes, NY | 10512 | 845 |
| Lake Carmel, NY | 10512 | 845 |
| Lake Lincolnd, NY | 10541 | 845 |
| Lake Lincolndale, NY | 10541 | 845 |
| Lake Mahopac, NY | 10541 | 845 |
| Lake Peekskill, NY | 10537 | 845 |
| Lake Secor, NY | 10541 | 845 |
| Mahopac, NY | 10541 | 845 |
| Mahopac Falls, NY | 10542 | 845 |
| Manitou, NY | 10524 | 845 |
| Nelsonville, NY | 10516 | 845 |
| North Highland, NY | 10516 | 845 |
| Oscawana Lake, NY | 10579 | 845 |
| Patterson, NY | 12563 | 845 |
| Philipstown, NY | 10516 | 845 |
| Putnam Valley, NY | 10579 | 845 |
| Sears Corners, NY | 10509 | 845 |
| Southeast, NY | 10509 | 845 |
| Tompkins Corners, NY | 10579 | 845 |