Andover | Town | 1848 | 15.46 | 3,303 | Town meeting | Tolland County | Capitol Region |
| 2 | Ansonia | City | 1889 | 6.03 | 19,249 | Mayor-council | New Haven County | Naugatuck Valley |
| 3 | Ashford | Town | 1714 | 38.79 | 4,100 | Town meeting | Windham County | Northeast CT |
| 4 | Avon | Town | 1830 | 23.12 | 18,098 | Council-manager | Hartford County | Capitol Region |
| 5 | Barkhamsted | Town | 1779 | 36.22 | 3,620 | Town meeting | Litchfield County | Northwest Hills |
| 6 | Beacon Falls | Town | 1871 | 9.78 | 6,049 | Town meeting | New Haven County | Naugatuck Valley |
| 7 | Berlin | Town | 1785 | 26.45 | 19,866 | Council-manager | Hartford County | Capitol Region |
| 8 | Bethany | Town | 1832 | 20.97 | 5,563 | Town meeting | New Haven County | South Central |
| 9 | Bethel | Town | 1855 | 16.79 | 18,584 | Town meeting | Fairfield County | Western CT |
| 10 | Bethlehem | Town | 1787 | 19.36 | 3,607 | Town meeting | Litchfield County | Naugatuck Valley |
| 11 | Bloomfield | Town | 1835 | 26.01 | 20,486 | Council-manager | Hartford County | Capitol Region |
| 12 | Bolton | Town | 1720 | 14.41 | 4,980 | Town meeting | Tolland County | Capitol Region |
| 13 | Bozrah | Town | 1786 | 19.97 | 2,627 | Town meeting | New London County | South Centraleastern CT |
| 14 | Branford | Town | 1685 | 21.98 | 28,026 | Representative town meeting | New Haven County | South Central | Totoket |
| 15 | Bridgeport | City | 1821 | 16 | 144,229 | Mayor-council | Fairfield County | CT Metropolitan | Pequonock |
| 16 | Bridgewater | Town | 1856 | 16.23 | 1,727 | Town meeting | Litchfield County | Western CT |
| 17 | Bristol | City | 1785 | 26.51 | 60,477 | Mayor-council | Hartford County | Naugatuck Valley |
| 18 | Brookfield | Town | 1788 | 19.8 | 16,452 | Town meeting | Fairfield County | Western CT |
| 19 | Brooklyn | Town | 1786 | 28.97 | 8,210 | Town meeting | Windham County | Northeast CT |
| 20 | Burlington | Town | 1806 | 29.8 | 9,301 | Town meeting | Hartford County | Northwest Hills |
| 21 | Canaan | Town | 1739 | 32.95 | 1,234 | Town meeting | Litchfield County | Northwest Hills |
| 22 | Canterbury | Town | 1703 | 39.9 | 5,132 | Town meeting | Windham County | Northeast CT | Peagscomsueck |
| 23 | Canton | Town | 1806 | 24.57 | 10,292 | Town meeting | Hartford County | Capitol Region |
| 24 | Chaplin | Town | 1822 | 19.43 | 2,305 | Town meeting | Windham County | Northeast CT |
| 25 | Cheshire | Town | 1780 | 32.91 | 29,261 | Council-manager | New Haven County | Naugatuck Valley |
| 26 | Chester | Town | 1836 | 16.03 | 3,994 | Town meeting | Middlesex County | Lower CT River |
| 27 | Clinton | Town | 1838 | 16.28 | 13,260 | Town meeting | Middlesex County | Lower CT River |
| 28 | Colchester | Town | 1698 | 49.06 | 16,068 | Town meeting | New London County | South Centraleastern CT |
| 29 | Colebrook | Town | 1779 | 31.47 | 1,485 | Town meeting | Litchfield County | Northwest Hills |
| 30 | Columbia | Town | 1804 | 21.36 | 5,485 | Town meeting | Tolland County | Capitol Region |
| 31 | Cornwall | Town | 1740 | 46.01 | 1,420 | Town meeting | Litchfield County | Northwest Hills |
| 32 | Coventry | Town | 1712 | 37.72 | 12,435 | Council-manager | Tolland County | Capitol Region |
| 33 | Cromwell | Town | 1851 | 12.39 | 14,005 | Town meeting | Middlesex County | Lower CT River |
| 34 | Danbury | City | 1687 | 42.11 | 80,893 | Mayor-council | Fairfield County | Western CT | Pahquioque |
| 35 | Darien | Town | 1820 | 12.86 | 20,732 | Representative town meeting | Fairfield County | Western CT |
| 36 | Deep River | Town | 1635 | 13.55 | 4,629 | Town meeting | Middlesex County | Lower CT River | Pattaquasset |
| 37 | Derby | City | 1675 | 4.98 | 12,902 | Mayor-council | New Haven County | Naugatuck Valley | Paugasset |
| 38 | Durham | Town | 1708 | 23.6 | 7,388 | Town meeting | Middlesex County | Lower CT River | Coginchaug |
| 39 | East Granby | Town | 1858 | 17.48 | 5,148 | Town meeting | Hartford County | Capitol Region |
| 40 | East Haddam | Town | 1734 | 54.33 | 9,126 | Town meeting | Middlesex County | Lower CT River | Macki-moodus |
| 41 | East Hampton | Town | 1767 | 35.59 | 12,959 | Council-manager | Middlesex County | Lower CT River |
| 42 | East Hartford | Town | 1783 | 18.02 | 51,252 | Mayor-council | Hartford County | Capitol Region | Podunk[1] |
| 43 | East Haven | Town | 1785 | 12.26 | 29,257 | Mayor-council | New Haven County | South Central |
| 44 | East Lyme | Town | 1839 | 34.03 | 19,159 | Town meeting | New London County | South Centraleastern CT |
| 45 | East Windsor | Town | 1768 | 26.29 | 11,162 | Town meeting | Hartford County | Capitol Region |
| 46 | Eastford | Town | 1847 | 28.89 | 1,749 | Town meeting | Windham County | Northeast CT |
| 47 | Easton | Town | 1845 | 27.42 | 7,490 | Town meeting | Fairfield County | CT Metropolitan |
| 48 | Ellington | Town | 1786 | 34.05 | 15,602 | Town meeting | Tolland County | Capitol Region |
| 49 | Enfield | Town | 1683 | 33.38 | 44,654 | Council-manager | Hartford County | Capitol Region |
| 50 | Essex | Town | 1852 | 10.36 | 6,683 | Town meeting | Middlesex County | Lower CT River | Patapoug |
| 51 | Fairfield | Town | 1666 | 30.03 | 59,404 | Representative town meeting | Fairfield County | CT Metropolitan | Uncoway |
| 52 | Farmington | Town | 1645 | 28.06 | 25,340 | Council-manager | Hartford County | Capitol Region |
| 53 | Franklin | Town | 1786 | 19.51 | 1,922 | Town meeting | New London County | South Centraleastern CT |
| 54 | Glastonbury | Town | 1690 | 51.37 | 34,427 | Council-manager | Hartford County | Capitol Region |
| 55 | Goshen | Town | 1739 | 43.66 | 2,976 | Town meeting | Litchfield County | Northwest Hills |
| 56 | Granby | Town | 1786 | 40.69 | 11,282 | Council-manager | Hartford County | Capitol Region |
| 57 | Greenwich | Town | 1665 | 47.83 | 61,171 | Representative town meeting | Fairfield County | Western CT | Patuquapaen |
| 58 | Griswold | Town | 1815 | 34.95 | 11,951 | Town meeting | New London County | South Centraleastern CT |
| 59 | Groton | Town | 1705 | 31.3 | 40,115 | Representative town meeting | New London County | South Centraleastern CT |
| 60 | Guilford | Town | 1639 | 47.05 | 22,375 | Town meeting | New Haven County | South Central | Menunkatuck |
| 61 | Haddam | Town | 1662 | 44.03 | 8,346 | Town meeting | Middlesex County | Lower CT River |
| 62 | Hamden | Town | 1786 | 32.78 | 60,960 | Mayor-council | New Haven County | South Central |
| 63 | Hampton | Town | 1786 | 25 | 1,863 | Town meeting | Windham County | Northeast CT |
| 64 | Hartford | City | 1635 | 17.31 | 124,775 | Mayor-council | Hartford County | Capitol Region | Suckiag |
| 65 | Hartland | Town | 1761 | 33.03 | 2,114 | Town meeting | Hartford County | Northwest Hills |
| 66 | Harwinton | Town | 1737 | 30.75 | 5,642 | Town meeting | Litchfield County | Northwest Hills |
| 67 | Hebron | Town | 1708 | 36.9 | 9,686 | Town meeting | Tolland County | Capitol Region |
| 68 | Kent | Town | 1739 | 48.47 | 2,979 | Town meeting | Litchfield County | Northwest Hills | Scatacook |
| 69 | Killingly | Town | 1708 | 48.52 | 17,370 | Council-manager | Windham County | Northeast CT | Aspinock |
| 70 | Killingworth | Town | 1667 | 35.33 | 6,525 | Town meeting | Middlesex County | Lower CT River | Hammonasset |
| 71 | Lebanon | Town | 1700 | 54.11 | 7,308 | Town meeting | New London County | South Centraleastern CT |
| 72 | Ledyard | Town | 1836 | 38.14 | 15,051 | Mayor-council | New London County | South Centraleastern CT |
| 73 | Lisbon | Town | 1786 | 16.26 | 4,338 | Town meeting | New London County | South Centraleastern CT |
| 74 | Litchfield | Town | 1719 | 56.06 | 8,466 | Town meeting | Litchfield County | Northwest Hills | Bantam |
| 75 | Lyme | Town | 1667 | 31.85 | 2,406 | Town meeting | New London County | Lower CT River |
| 76 | Madison | Town | 1826 | 36.2 | 18,269 | Town meeting | New Haven County | South Central |
| 77 | Manchester | Town | 1823 | 27.26 | 58,241 | Council-manager | Hartford County | Capitol Region |
| 78 | Mansfield | Town | 1702 | 44.46 | 26,543 | Council-manager | Tolland County | Capitol Region | Noubesetuck |
| 79 | Marlborough | Town | 1803 | 23.28 | 6,404 | Town meeting | Hartford County | Capitol Region |
| 80 | Meriden | City | 1806 | 23.75 | 60,868 | Council-manager | New Haven County | South Central |
| 81 | Middlebury | Town | 1807 | 17.75 | 7,575 | Town meeting | New Haven County | Naugatuck Valley |
| 82 | Middlefield | Town | 1866 | 12.7 | 4,425 | Town meeting | Middlesex County | Lower CT River |
| 83 | Middletown | City | 1651 | 40.9 | 47,648 | Mayor-council | Middlesex County | Lower CT River | Mattabeset |
| 84 | Milford | City | 1639 | 22.56 | 52,759 | Mayor-council | New Haven County | South Central | Wepawaug |
| 85 | Monroe | Town | 1823 | 26.13 | 19,479 | Town meeting | Fairfield County | CT Metropolitan |
| 86 | Montville | Town | 1786 | 42.02 | 19,571 | Mayor-council | New London County | South Centraleastern CT |
| 87 | Morris | Town | 1859 | 17.19 | 2,388 | Town meeting | Litchfield County | Northwest Hills |
| 88 | Naugatuck | Borough | 1844 | 16.39 | 31,862 | Mayor-council | New Haven County | Naugatuck Valley |
| 89 | New Britain | City | 1850 | 13.34 | 73,206 | Mayor-council | Hartford County | Capitol Region |
| 90 | New Canaan | Town | 1801 | 22.13 | 19,738 | Mayor-council | Fairfield County | Western CT |
| 91 | New Fairfield | Town | 1740 | 20.46 | 13,881 | Town meeting | Fairfield County | Western CT |
| 92 | New Hartford | Town | 1738 | 37.03 | 6,970 | Town meeting | Litchfield County | Northwest Hills |
| 93 | New Haven | City | 1638 | 18.85 | 129,779 | Mayor-council | New Haven County | South Central | Quinnipiac |
| 94 | New London | City | 1646 | 5.54 | 27,620 | Mayor-council | New London County | South Centraleastern CT | Nameaug |
| 95 | New Milford | Town | 1712 | 61.59 | 28,142 | Mayor-council | Litchfield County | Western CT | Weantinogue |
| 96 | Newington | Town | 1871 | 13.18 | 30,562 | Council-manager | Hartford County | Capitol Region |
| 97 | Newtown | Town | 1711 | 57.76 | 27,560 | Town meeting | Fairfield County | Western CT | Quonapague |
| 98 | Norfolk | Town | 1758 | 45.31 | 1,709 | Town meeting | Litchfield County | Northwest Hills |
| 99 | North Branford | Town | 1831 | 24.92 | 14,407 | Council-manager | New Haven County | South Central |
| 100 | North Canaan | Town | 1858 | 19.45 | 3,315 | Town meeting | Litchfield County | Northwest Hills |
| 101 | North Haven | Town | 1786 | 20.77 | 24,093 | Town meeting | New Haven County | South Central |
| 102 | North Stonington | Town | 1807 | 54.31 | 5,297 | Town meeting | New London County | South Centraleastern CT |
| 103 | Norwalk | City | 1651 | 22.81 | 85,603 | Mayor-council | Fairfield County | Western CT | Naramauke |
| 104 | Norwich | City | 1662 | 28.33 | 40,493 | Council-manager | New London County | South Centraleastern CT | Mohegan |
| 105 | Old Lyme | Town | 1855 | 23.1 | 7,603 | Town meeting | New London County | Lower CT River |
| 106 | Old Saybrook | Town | 1854 | 15.04 | 10,242 | Town meeting | Middlesex County | Lower CT River |
| 107 | Orange | Town | 1822 | 17.19 | 13,956 | Town meeting | New Haven County | South Central |
| 108 | Oxford | Town | 1798 | 32.89 | 12,683 | Town meeting | New Haven County | Naugatuck Valley |
| 109 | Plainfield | Town | 1699 | 42.27 | 15,405 | Town meeting | Windham County | Northeast CT |
| 110 | Plainville | Town | 1869 | 9.76 | 17,716 | Council-manager | Hartford County | Capitol Region |
| 111 | Plymouth | Town | 1795 | 21.72 | 12,243 | Mayor-council | Litchfield County | Naugatuck Valley |
| 112 | Pomfret | Town | 1713 | 40.3 | 4,247 | Town meeting | Windham County | Northeast CT | Mashamoquet |
| 113 | Portland | Town | 1841 | 23.4 | 9,508 | Town meeting | Middlesex County | Lower CT River |
| 114 | Preston | Town | 1687 | 30.9 | 4,726 | Town meeting | New London County | South Centraleastern CT |
| 115 | Prospect | Town | 1827 | 14.32 | 9,405 | Mayor-council | New Haven County | Naugatuck Valley |
| 116 | Putnam | Town | 1855 | 20.29 | 9,584 | Town meeting | Windham County | Northeast CT | Quinebaug |
| 117 | Redding | Town | 1767 | 31.5 | 9,158 | Town meeting | Fairfield County | Western CT |
| 118 | Ridgefield | Town | 1709 | 34.43 | 24,638 | Town meeting | Fairfield County | Western CT | Caudatowa |
| 119 | Rocky Hill | Town | 1843 | 13.45 | 19,709 | Representative town meeting | Hartford County | Capitol Region |
| 120 | Roxbury | Town | 1796 | 26.23 | 2,262 | Town meeting | Litchfield County | Northwest Hills | Shepaug |
| 121 | Salem | Town | 1819 | 28.95 | 4,151 | Town meeting | New London County | South Centraleastern CT |
| 122 | Salisbury | Town | 1741 | 57.32 | 3,741 | Town meeting | Litchfield County | Northwest Hills | Weatogue |
| 123 | Scotland | Town | 1857 | 18.61 | 1,726 | Town meeting | Windham County | Northeast CT |
| 124 | Seymour | Town | 1850 | 14.57 | 16,540 | Town meeting | New Haven County | Naugatuck Valley | Naugatuck |
| 125 | Sharon | Town | 1739 | 58.7 | 2,782 | Town meeting | Litchfield County | Northwest Hills |
| 126 | Shelton | City | 1789 | 30.57 | 39,559 | Mayor-council | Fairfield County | Naugatuck Valley | Quorum |
| 127 | Sherman | Town | 1802 | 21.8 | 3,581 | Town meeting | Fairfield County | Western CT |
| 128 | Simsbury | Town | 1670 | 33.88 | 23,511 | Town meeting | Hartford County | Capitol Region |
| 129 | Somers | Town | 1734 | 28.34 | 11,444 | Town meeting | Tolland County | Capitol Region |
| 130 | South Windsor | Town | 1845 | 27.96 | 25,709 | Council-manager | Hartford County | Capitol Region |
| 131 | Southbury | Town | 1787 | 39.06 | 19,904 | Town meeting | New Haven County | Naugatuck Valley |
| 132 | Southington | Town | 1779 | 35.99 | 43,069 | Council-manager | Hartford County | Capitol Region |
| 133 | Sprague | Town | 1861 | 13.21 | 2,984 | Town meeting | New London County | South Centraleastern CT |
| 134 | Stafford | Town | 1719 | 57.96 | 12,087 | Town meeting | Tolland County | Capitol Region |
| 135 | Stamford | City | 1641 | 37.75 | 122,643 | Mayor-council | Fairfield County | Western CT | Rippowam |
| 136 | Sterling | Town | 1794 | 27.23 | 3,830 | Town meeting | Windham County | Northeast CT |
| 137 | Stonington | Town | 1662 | 38.69 | 18,545 | Town meeting | New London County | South Centraleastern CT | Pawcatuck, Mistack |
| 138 | Stratford | Town | 1639 | 17.59 | 51,384 | Mayor-council | Fairfield County | CT Metropolitan | Cupheag |
| 139 | Suffield | Town | 1674 | 42.21 | 15,735 | Town meeting | Hartford County | Capitol Region |
| 140 | Thomaston | Town | 1875 | 12.01 | 7,887 | Town meeting | Litchfield County | Naugatuck Valley |
| 141 | Thompson | Town | 1785 | 46.94 | 9,458 | Town meeting | Windham County | Northeast CT |
| 142 | Tolland | Town | 1715 | 39.71 | 15,052 | Council-manager | Tolland County | Capitol Region |
| 143 | Torrington | City | 1740 | 39.79 | 36,383 | Mayor-council | Litchfield County | Northwest Hills |
| 144 | Trumbull | Town | 1797 | 23.29 | 36,018 | Mayor-council | Fairfield County | CT Metropolitan |
| 145 | Union | Town | 1734 | 28.71 | 854 | Town meeting | Tolland County | Northeast CT |
| 146 | Vernon | Town | 1808 | 17.73 | 29,179 | Mayor-council | Tolland County | Capitol Region |
| 147 | Voluntown | Town | 1721 | 38.92 | 2,603 | Town meeting | New London County | Northeast CT |
| 148 | Wallingford | Town | 1670 | 39.02 | 45,135 | Mayor-council | New Haven County | South Central | Quinnipiac |
| 149 | Warren | Town | 1786 | 26.31 | 1,461 | Town meeting | Litchfield County | Northwest Hills |
| 150 | Washington | Town | 1779 | 38.19 | 3,578 | Town meeting | Litchfield County | Northwest Hills |
| 151 | Waterbury | City | 1686 | 28.57 | 110,366 | Mayor-council | New Haven County | Naugatuck Valley | Mattatuck |
| 152 | Waterford | Town | 1801 | 32.75 | 19,517 | Representative town meeting | New London County | South Centraleastern CT |
| 153 | Watertown | Town | 1780 | 29.15 | 22,514 | Council-manager | Litchfield County | Naugatuck Valley |
| 154 | West Hartford | Town | 1854 | 21.98 | 63,268 | Council-manager | Hartford County | Capitol Region |
| 155 | West Haven | City | 1921 | 10.84 | 55,564 | Mayor-council | New Haven County | South Central |
| 156 | Westbrook | Town | 1840 | 15.72 | 6,938 | Town meeting | Middlesex County | Lower CT River | Pochaug |
| 157 | Weston | Town | 1787 | 19.8 | 10,179 | Town meeting | Fairfield County | Western CT | Aspetuck |
| 158 | Westport | Town | 1835 | 20.01 | 26,391 | Representative town meeting | Fairfield County | Western CT | Saugatuck |
| 159 | Wethersfield | Town | 1634 | 12.39 | 26,668 | Council-manager | Hartford County | Capitol Region | Pyquag |
| 160 | Willington | Town | 1727 | 33.27 | 6,041 | Town meeting | Tolland County | Capitol Region |
| 161 | Wilton | Town | 1802 | 26.95 | 18,062 | Town meeting | Fairfield County | Western CT |
| 162 | Winchester | Town | 1771 | 32.28 | 11,242 | Council-manager | Litchfield County | Northwest Hills |
| 163 | Windham | Town | 1692 | 27.07 | 25,268 | Town meeting | Windham County | South Centraleastern CT |
| 164 | Windsor | Town | 1633 | 29.63 | 29,044 | Council-manager | Hartford County | Capitol Region |
| 165 | Windsor Locks | Town | 1854 | 9.03 | 12,498 | Town meeting | Hartford County | Capitol Region |
| 166 | Wolcott | Town | 1796 | 20.43 | 16,680 | Mayor-council | New Haven County | Naugatuck Valley |
| 167 | Woodbridge | Town | 1784 | 18.83 | 8,990 | Town meeting | New Haven County | South Central |
| 168 | Woodbury | Town | 1673 | 36.47 | 9,975 | Town meeting | Litchfield County | Naugatuck Valley | Pomperaug |
| 169 | Woodstock | Town | 1686 | 60.54 | 7,964 | Town meeting | Windham County | Northeast CT |