| City Name | County Name: | Population | Median Age |
| Andover | Tolland | 3,203 | 45.8 |
| Ansonia | New Haven | 18,654 | 40 |
| Ashford | Windham | 4,236 | 43.9 |
| Avon | Hartford | 18,312 | 45.2 |
| Baltic | New London | 1,237 | 35.5 |
| Barkhamsted | Litchfield | 3,649 | 48.4 |
| Beacon Falls | New Haven | 6,168 | 47.2 |
| Berlin | Hartford | 20,484 | 47.5 |
| Bethany | New Haven | 5,513 | 47.9 |
| Bethel | Fairfield | 19,663 | 42.9 |
| Bethlehem | Litchfield | 3,433 | 44.9 |
| Bethlehem Village | Litchfield | 1,995 | 50.5 |
| Bloomfield | Hartford | 21,022 | 51.3 |
| Blue Hills | Hartford | 2,913 | 48.1 |
| Bolton | Tolland | 4,911 | 46.3 |
| Bozrah | New London | 2,589 | 45 |
| Branford | New Haven | 28,020 | 49 |
| Branford Center | New Haven | 6,163 | 50.6 |
| Bridgeport | Fairfield | 924,449 | 34.3 |
| Bridgewater | Litchfield | 1,707 | 54.9 |
| Bristol | Hartford | 59,947 | 40.5 |
| Broad Brook | Hartford | 4,695 | 36.3 |
| Brookfield | Fairfield | 17,016 | 45.5 |
| Brooklyn | Windham | 8,238 | 44.3 |
| Burlington | Hartford | 9,659 | 44.7 |
| Byram | Fairfield | 4,560 | 41.2 |
| Canaan | Litchfield | 1,050 | 46.2 |
| Canterbury | Windham | 5,069 | 44.7 |
| Canton | Hartford | 10,288 | 46.8 |
| Canton Valley | Hartford | 1,651 | 52.1 |
| Chaplin | Windham | 2,489 | 46.1 |
| Cheshire | New Haven | 29,147 | 46.2 |
| Cheshire Village | New Haven | 6,082 | 47.2 |
| Chester | Middlesex | 4,234 | 50 |
| Chester Center | Middlesex | 1,566 | 49.4 |
| Clinton | Middlesex | 12,944 | 46.6 |
| Colchester | New London | 15,860 | 42.5 |
| Colebrook | Litchfield | 1,484 | 47.5 |
| Collinsville | Hartford | 3,328 | 47 |
| Columbia | Tolland | 5,417 | 48.6 |
| Conning Towers Nautilus Park | New London | 9,785 | 23.6 |
| Cornwall | Litchfield | 1,291 | 57 |
| Cos Cob | Fairfield | 6,990 | 42.8 |
| Coventry | Tolland | 12,433 | 43.1 |
| Coventry Lake | Tolland | 2,530 | 48.2 |
| Cromwell | Middlesex | 13,910 | 43.7 |
| Crystal Lake | Tolland | 2,188 | 48.5 |
| Danbury | Fairfield | 176,030 | 38.3 |
| Danielson | Windham | 4,012 | 39.4 |
| Darien | Fairfield | 21,742 | 40.1 |
| Deep River | Middlesex | 4,480 | 47.1 |
| Deep River Center | Middlesex | 2,354 | 43.6 |
| Derby | New Haven | 12,339 | 40 |
| Durham | Middlesex | 7,221 | 47.1 |
| East Brooklyn | Windham | 1,521 | 38.2 |
| East Granby | Hartford | 5,304 | 43.3 |
| East Haddam | Middlesex | 9,007 | 48.2 |
| East Hampton | Middlesex | 12,827 | 45.2 |
| East Hartford | Hartford | 50,272 | 37.8 |
| East Haven | New Haven | 28,742 | 43 |
| East Lyme | New London | 18,724 | 48.2 |
| East Windsor | Hartford | 11,445 | 45.3 |
| Eastford | Windham | 1,653 | 48.8 |
| Easton | Fairfield | 7,543 | 50.2 |
| Ellington | Tolland | 16,170 | 41 |
| Enfield | Hartford | 44,143 | 41 |
| Essex | Middlesex | 6,604 | 54.6 |
| Essex Village | Middlesex | 2,480 | 56.9 |
| Fairfield | Fairfield | 61,740 | 41.4 |
| Farmington | Hartford | 25,528 | 45 |
| Franklin | New London | 1,778 | 48.6 |
| Georgetown | Fairfield | 1,630 | 43.8 |
| Glastonbury | Hartford | 34,564 | 45.2 |
| Glastonbury Center | Hartford | 7,929 | 44.7 |
| Glenville | Fairfield | 2,538 | 47.7 |
| Goshen | Litchfield | 2,883 | 49.8 |
| Granby | Hartford | 11,361 | 46.2 |
| Greenwich | Fairfield | 62,587 | 43.2 |
| Griswold | New London | 11,622 | 40 |
| Groton | New London | 38,825 | 34.1 |
| Guilford | New Haven | 22,216 | 48.6 |
| Guilford Center | New Haven | 2,689 | 52.4 |
| Haddam | Middlesex | 8,227 | 48.3 |
| Hamden | New Haven | 60,982 | 36.8 |
| Hampton | Windham | 1,830 | 51.4 |
| Hartford | Hartford | 905,152 | 32.1 |
| Hartland | Hartford | 1,982 | 51 |
| Harwinton | Litchfield | 5,456 | 47.9 |
| Hazardville | Hartford | 4,615 | 42.6 |
| Hebron | Tolland | 9,512 | 45.5 |
| Heritage Village | New Haven | 4,156 | 73.6 |
| Higganum | Middlesex | 1,285 | 47.3 |
| Jewett City | New London | 9,749 | 29.8 |
| Kensington | Hartford | 7,971 | 46.4 |
| Kent | Litchfield | 2,799 | 54 |
| Killingly | Windham | 17,231 | 42.5 |
| Killingworth | Middlesex | 6,392 | 48 |
| Lake Pocotopaug | Middlesex | 3,117 | 47.3 |
| Lakeville | Litchfield | 1,040 | 45.7 |
| Lebanon | New London | 7,215 | 45.7 |
| Ledyard | New London | 14,761 | 38.1 |
| Lisbon | New London | 4,247 | 44.8 |
| Litchfield | Litchfield | 8,147 | 53.9 |
| Long Hill | New London | 4,369 | 33.2 |
| Lyme | New London | 2,499 | 51.7 |
| Madison | New Haven | 18,113 | 49.3 |
| Madison Center | New Haven | 2,197 | 59.3 |
| Manchester | Hartford | 57,805 | 35.7 |
| Mansfield | Tolland | 25,799 | 21 |
| Marlborough | Hartford | 6,368 | 44.6 |
| Meriden | New Haven | 59,395 | 40.9 |
| Middlebury | New Haven | 7,739 | 47.3 |
| Middlefield | Middlesex | 4,381 | 48.4 |
| Middletown | Middlesex | 46,258 | 37 |
| Milford | New Haven | 54,328 | 45.7 |
| Milford city | New Haven | 53,195 | 45.5 |
| Monroe | Fairfield | 19,546 | 43.3 |
| Montville | New London | 18,835 | 43.7 |
| Moodus | Middlesex | 1,391 | 41.8 |
| Moosup | Windham | 4,173 | 33.7 |
| Morris | Litchfield | 2,205 | 46.3 |
| Mystic | New London | 4,249 | 54.8 |
| Naugatuck | New Haven | 31,108 | 39.9 |
| New Britain | Hartford | 72,495 | 33.8 |
| New Canaan | Fairfield | 20,276 | 43.9 |
| New Fairfield | Fairfield | 13,955 | 46.4 |
| New Hartford | Litchfield | 6,703 | 46.6 |
| New Hartford Center | Litchfield | 1,047 | 38.5 |
| New Haven | New Haven | 564,830 | 30.8 |
| New London | New London | 26,858 | 31.6 |
| New Milford | Litchfield | 27,014 | 44 |
| Newington | Hartford | 30,234 | 45.5 |
| Newtown | Fairfield | 27,822 | 46 |
| Niantic | New London | 2,935 | 55.3 |
| Noank | New London | 1,432 | 57.4 |
| Norfolk | Litchfield | 1,628 | 51.9 |
| North Branford | New Haven | 14,191 | 48.1 |
| North Canaan | Litchfield | 3,281 | 49.1 |
| North Granby | Hartford | 1,485 | 47.4 |
| North Grosvenor Dale | Windham | 1,130 | 35.4 |
| North Haven | New Haven | 23,722 | 46.8 |
| North Stonington | New London | 5,223 | 44.3 |
| Northwest Harwinton | Litchfield | 3,011 | 51.5 |
| Norwalk | Fairfield | 88,816 | 40.4 |
| Norwich | New London | 200,289 | 37.9 |
| Oakville | Litchfield | 8,799 | 47.1 |
| Old Greenwich | Fairfield | 6,844 | 41.8 |
| Old Lyme | New London | 7,396 | 52.7 |
| Old Mystic | New London | 3,383 | 48.1 |
| Old Saybrook | Middlesex | 10,090 | 51.8 |
| Old Saybrook Center | Middlesex | 2,296 | 48.5 |
| Orange | New Haven | 13,934 | 46.2 |
| Oxford | New Haven | 13,086 | 46.5 |
| Oxoboxo River | New London | 2,825 | 50.9 |
| Pawcatuck | New London | 5,305 | 44.1 |
| Pemberwick | Fairfield | 4,083 | 38.2 |
| Plainfield | Windham | 15,105 | 40.4 |
| Plainfield Village | Windham | 1,920 | 49.7 |
| Plainville | Hartford | 17,619 | 43.3 |
| Plantsville | Hartford | 1,692 | 56.1 |
| Plymouth | Litchfield | 11,711 | 45 |
| Pomfret | Windham | 4,186 | 44.6 |
| Poquonock Bridge | New London | 2,098 | 25.8 |
| Portland | Middlesex | 9,322 | 46.4 |
| Preston | New London | 4,657 | 45.9 |
| Prospect | New Haven | 9,705 | 45.6 |
| Putnam | Windham | 9,361 | 48.8 |
| Quinebaug | Windham | 1,484 | 49.5 |
| Redding | Fairfield | 9,176 | 46.6 |
| Ridgefield | Fairfield | 25,042 | 45.6 |
| Riverside | Fairfield | 8,604 | 42.5 |
| Rockville | Tolland | 7,115 | 31.4 |
| Rocky Hill | Hartford | 20,168 | 43.2 |
| Roxbury | Litchfield | 2,105 | 53.3 |
| Salem | New London | 4,112 | 45.7 |
| Salisbury | Litchfield | 3,625 | 57.1 |
| Salmon Brook | Hartford | 2,294 | 50.7 |
| Scotland | Windham | 1,569 | 46.8 |
| Seymour | New Haven | 16,508 | 41.2 |
| Sharon | Litchfield | 2,700 | 56.2 |
| Shelton | Fairfield | 41,129 | 47.2 |
| Sherman | Fairfield | 3,649 | 51.6 |
| Sherwood Manor | Hartford | 5,513 | 46.2 |
| Simsbury | Hartford | 24,799 | 45.4 |
| Simsbury Center | Hartford | 6,154 | 49.4 |
| Somers | Tolland | 11,005 | 47.5 |
| South Coventry | Tolland | 1,224 | 54.2 |
| South Windham | Windham | 1,459 | 33 |
| South Windsor | Hartford | 25,898 | 42.3 |
| South Woodstock | Windham | 1,408 | 40.9 |
| Southbury | New Haven | 19,681 | 52.4 |
| Southington | Hartford | 43,781 | 45.3 |
| Southport | Fairfield | 1,661 | 56.3 |
| Southwood Acres | Hartford | 7,473 | 43.7 |
| Sprague | New London | 2,906 | 40.2 |
| Stafford | Tolland | 11,881 | 44.3 |
| Stafford Springs | Tolland | 5,023 | 40.7 |
| Stamford | Fairfield | 129,638 | 36.9 |
| Sterling | Windham | 3,757 | 42.5 |
| Stonington | New London | 18,445 | 50.8 |
| Storrs | Tolland | 16,352 | 20.4 |
| Stratford | Fairfield | 52,120 | 42.6 |
| Suffield | Hartford | 15,688 | 43.5 |
| Suffield Depot | Hartford | 1,227 | 46.2 |
| Tariffville | Hartford | 1,529 | 37.6 |
| Terryville | Litchfield | 5,030 | 43.6 |
| Thomaston | Litchfield | 7,599 | 45.8 |
| Thompson | Windham | 9,351 | 43.5 |
| Thompsonville | Hartford | 8,701 | 36.4 |
| Tolland | Tolland | 14,713 | 43.4 |
| Torrington | Litchfield | 40,003 | 44.9 |
| Trumbull | Fairfield | 35,976 | 43 |
| Vernon | Tolland | 29,232 | 37.9 |
| Voluntown | New London | 2,535 | 45.7 |
| Wallingford | New Haven | 44,596 | 47.4 |
| Wallingford Center | New Haven | 18,360 | 43.4 |
| Warren | Litchfield | 1,457 | 51.1 |
| Washington | Litchfield | 3,450 | 53.7 |
| Waterbury | New Haven | 189,614 | 34.8 |
| Waterford | New London | 18,935 | 48.4 |
| Watertown | Litchfield | 21,751 | 45.8 |
| Wauregan | Windham | 1,458 | 33.8 |
| Weatogue | Hartford | 2,738 | 41.4 |
| West Hartford | Hartford | 63,063 | 40.7 |
| West Haven | New Haven | 54,620 | 36.6 |
| West Simsbury | Hartford | 2,764 | 50.7 |
| Westbrook | Middlesex | 6,903 | 54.2 |
| Westbrook Center | Middlesex | 2,237 | 58.5 |
| Weston | Fairfield | 10,287 | 46.8 |
| Westport | Fairfield | 28,016 | 45.8 |
| Wethersfield | Hartford | 26,171 | 44.5 |
| Willimantic | Windham | 17,358 | 28.5 |
| Willington | Tolland | 5,893 | 33.6 |
| Wilton | Fairfield | 18,463 | 43.6 |
| Winchester | Litchfield | 10,730 | 47.1 |
| Windham | Windham | 24,655 | 30.8 |
| Windsor | Hartford | 28,859 | 43.6 |
| Windsor Locks | Hartford | 12,671 | 43.9 |
| Winsted | Litchfield | 7,121 | 42.9 |
| Wolcott | New Haven | 16,615 | 45.8 |
| Woodbridge | New Haven | 8,827 | 49.3 |
| Woodbury | Litchfield | 9,562 | 50.3 |
| Woodbury Center | Litchfield | 1,194 | 49.1 |
| Woodmont | New Haven | 1,552 | 51 |
| Woodstock | Windham | 7,836 | 44.5 |