Founded in 1666, New London County is one of 8 counties in the state of Connecticut. The city of New London is the county seat. With FIPS code of 11, New London County has a population of 268,805 and area of 666 square miles (1,725 km2).
List of all cities in New London County, CT alphabetically
| City/Town | Postal Code | Area Code |
| Baltic, CT | 06330 | 860/959 |
| 06351 | 860/959 | |
| Borough, CT | 06340 | 860/959 |
| Bozrah, CT | 06334 | 860/959 |
| Canterbury, CT | 06351 | 860/959 |
| Center Groton, CT | 06340 | 860/959 |
| Chesterfield, CT | 06370 | 860/959 |
| Colchester, CT | 06415 | 860/959 |
| 06420 | 860/959 | |
| East Lyme, CT | 06333 | 860/959 |
| Exeter, CT | 06249 | 860/959 |
| Fitchville, CT | 06334 | 860/959 |
| Fort Trumbull, CT | 06320 | 860/959 |
| Franklin, CT | 06254 | 860/959 |
| Franklin Hill, CT | 06254 | 860/959 |
| Gales Ferry, CT | 06335 | 860/959 |
| 06339 | 860/959 | |
| Gilman, CT | 06336 | 860/959 |
| Glasgo, CT | 06384 | 860/959 |
| Griswold, CT | 06351 | 860/959 |
| Groton, CT | 06340 | 860/959 |
| 06349 | 860/959 | |
| Groton Long Point, CT | 06340 | 860/959 |
| Hadlyme, CT | 06439 | 860/959 |
| Hanover, CT | 06350 | 860/959 |
| Hopeville, CT | 06351 | 860/959 |
| Jewett City, CT | 06351 | 860/959 |
| Jordan Village, CT | 06385 | 860/959 |
| Jupiter Point, CT | 06340 | 860/959 |
| Lebanon, CT | 06249 | 860/959 |
| Ledyard, CT | 06338 | 860/959 |
| 06339 | 860/959 | |
| Lisbon, CT | 06351 | 860/959 |
| Lords Point, CT | 06378 | 860/959 |
| Lyme, CT | 06371 | 860/959 |
| Mashantucket, CT | 06338 | 860/959 |
| Masons Island, CT | 06355 | 860/959 |
| Millstone, CT | 06385 | 860/959 |
| Montville, CT | 06353 | 860/959 |
| Mystic, CT | 06355 | 860/959 |
| 06388 | 860/959 | |
| Naval Submarine Base, CT | 06349 | 860/959 |
| Navsub Base, CT | 06349 | 860/959 |
| New London, CT | 06320 | 860/959 |
| Niantic, CT | 06357 | 860/959 |
| Noank, CT | 06340 | 860/959 |
| North Franklin, CT | 06254 | 860/959 |
| North Lyme, CT | 06371 | 860/959 |
| North Stonington, CT | 06359 | 860/959 |
| North Westchester, CT | 06474 | 860/959 |
| Norwich, CT | 06360 | 860/959 |
| 06365 | 860/959 | |
| Norwichtown, CT | 06360 | 860/959 |
| Oakdale, CT | 06370 | 860/959 |
| Occum, CT | 06360 | 860/959 |
| Old Lyme, CT | 06371 | 860/959 |
| Old Mystic, CT | 06372 | 860/959 |
| Pawcatuck, CT | 06379 | 860/959 |
| Point O Woods, CT | 06376 | 860/959 |
| Poquetanuck, CT | 06360 | 860/959 |
| Poquonock Bridge, CT | 06340 | 860/959 |
| Preston, CT | 06351 | 860/959 |
| 06365 | 860/959 | |
| Quaker Hill, CT | 06375 | 860/959 |
| Salem, CT | 06420 | 860/959 |
| Shawondassee, CT | 06378 | 860/959 |
| South Lyme, CT | 06376 | 860/959 |
| Sprague, CT | 06330 | 860/959 |
| Stonington, CT | 06378 | 860/959 |
| Sub Base New London, CT | 06349 | 860/959 |
| Submarine Base, CT | 06349 | 860/959 |
| Taftville, CT | 06380 | 860/959 |
| U S Coast Guard Acadamy, CT | 06320 | 860/959 |
| Uncasville, CT | 06382 | 860/959 |
| United States Coast Guard Acadamy, CT | 06320 | 860/959 |
| Versailles, CT | 06383 | 860/959 |
| Voluntown, CT | 06384 | 860/959 |
| Waterford, CT | 06385 | 860/959 |
| West Mystic, CT | 06388 | 860/959 |
| Yantic, CT | 06389 | 860/959 |
Map of Cities in New London County, CT
