Founded in 1860, Knox County is one of 16 counties in the state of Maine. Historically, Knox County was formed from parts of Lincoln County and Waldo County. The city of Rockland is the county seat. With FIPS code of 13, Knox County has a population of 41,084 and area of 1,142 square miles (2,958 km2).
List of all cities in Knox County, ME alphabetically
| City/Town | Postal Code | Area Code |
| Appleton, ME | 04862 | 207 |
| Camden, ME | 04843 | 207 |
| 04847 | 207 | |
| Cushing, ME | 04563 | 207 |
| Friendship, ME | 04547 | 207 |
| Glen Cove, ME | 04846 | 207 |
| Hope, ME | 04847 | 207 |
| Isle au Haut, ME | 04645 | 207 |
| Matinicus, ME | 04851 | 207 |
| North Haven, ME | 04853 | 207 |
| Owls Head, ME | 04854 | 207 |
| Port Clyde, ME | 04855 | 207 |
| Rockland, ME | 04841 | 207 |
| Rockport, ME | 04856 | 207 |
| Saint George, ME | 04860 | 207 |
| South Thomaston, ME | 04858 | 207 |
| Spruce Head, ME | 04859 | 207 |
| Stonington, ME | 04645 | 207 |
| Tenants Harbor, ME | 04859 | 207 |
| 04860 | 207 | |
| Thomaston, ME | 04861 | 207 |
| Union, ME | 04862 | 207 |
| Vinalhaven, ME | 04863 | 207 |
| Warren, ME | 04864 | 207 |
| Washington, ME | 04574 | 207 |
| West Rockport, ME | 04865 | 207 |