| 1 | Waterford CDP (west-northwest) | 12.4% |
| 2 | Willimantic CDP (northeast) | 9.3% |
| 3 | New London city (north) | 6.6% |
| 4 | Waterford CDP (east-northeast) | 4.5% |
| 5 | Willimantic CDP (east-southeast) | 4.5% |
| 6 | South Windham CDP (northwest) | 4.1% |
| 7 | Groton city (north-northwest) | 3.6% |
| 8 | Norwich city (south-southeast 2) | 3.5% |
| 9 | New London city (east-southeast) | 3.2% |
| 10 | Norwich city (south) | 2.7% |
| 11 | Waterford CDP (east) | 2.6% |
| 12 | Willimantic CDP (west) | 2.5% |
| 13 | Niantic CDP (south-southeast) | 2.4% |
| 14 | Norwich city (south-southeast 1) | 2.4% |
| 15 | Jewett City borough (west-northwest) | 2.3% |
| 16 | Long Hill CDP (west-northwest) | 2.2% |
| 17 | Oxoboxo River CDP (south-southeast) | 2% |
| 18 | Stonington borough (northwest) | 1.8% |
| 19 | Baltic CDP (north) | 1.5% |
| 20 | Mystic CDP (east-southeast) | 1.5% |
| 21 | Norwich city (east-northeast) | 1.5% |
| 22 | Groton Long Point borough | 1.4% |
| 23 | Norwich city (north-northwest) | 1.4% |
| 24 | New London city (southwest) | 1.3% |
| 25 | Oxoboxo River CDP (east-northeast) | 1.3% |
| 26 | Norwich city (west-northwest) | 1.1% |
| 27 | Waterford CDP (south-southeast) | 1.1% |
| 28 | Gales Ferry CDP (northeast) | 0.9% |
| 29 | Oxoboxo River CDP (west) | 0.9% |
| 30 | Mystic CDP (west-northwest) | 0.7% |
| 31 | Norwich city (north-northeast) | 0.7% |
| 32 | Pawcatuck CDP | 0.7% |
| 33 | Waterford CDP (west-southwest) | 0.7% |
| 34 | Niantic CDP (north-northwest) | 0.6% |
| 35 | Waterford CDP (north) | 0.4% |
| 36 | Baltic CDP (west-southwest) | 0.3% |
| 37 | Jewett City borough (east-southeast) | 0.2% |
| 38 | Oxoboxo River CDP (north-northwest) | 0.2% |
| 39 | Stonington borough (south-southwest) | 0.2% |
| 40 | Colchester CDP (east) | 0.1% |
| 41 | Mashantucket CDP (west) | 0.1% |
| 42 | Baltic CDP (east) | 0% |
| 43 | Colchester CDP (north-northwest) | 0% |
| 44 | Colchester CDP (west-southwest) | 0% |
| 45 | Conning Towers-Nautilus Park CDP (northeast) | 0% |
| 46 | Conning Towers-Nautilus Park CDP (southwest) | 0% |
| 47 | Gales Ferry CDP (north-northwest) | 0% |
| 48 | Gales Ferry CDP (south-southeast) | 0% |
| 49 | Gales Ferry CDP (south-southwest) | 0% |
| 50 | Groton city (south-southeast) | 0% |
| 51 | Long Hill CDP (east-southeast) | 0% |
| 52 | Mashantucket CDP (east) | 0% |
| 53 | Mashantucket CDP (northwest) | 0% |
| 54 | Mashantucket CDP (south) | 0% |
| 55 | Niantic CDP (east-northeast) | 0% |
| 56 | Niantic CDP (north) | 0% |
| 57 | Niantic CDP (south-southwest) | 0% |
| 58 | Niantic CDP (west-northwest) | 0% |
| 59 | Norwich city (south-southwest) | 0% |
| 60 | Old Mystic CDP | 0% |
| 61 | Oxoboxo River CDP (east-southeast) | 0% |
| 62 | Oxoboxo River CDP (west-southwest) | 0% |
| 63 | Poquonock Bridge CDP | 0% |
| 64 | South Windham CDP (north) | 0% |
| 65 | South Windham CDP (northeast) | 0% |
| 66 | South Windham CDP (south-southwest) | 0% |
| 67 | Stonington borough (east-southeast) | 0% |