| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 172,345 | 118,999 | 295,927 | |
| 2020 | D | 191,498 | 113,175 | 308,934 | |
| 2016 | D | 156,746 | 107,239 | 275,383 | |
| 2012 | D | 141,031 | 115,600 | 259,113 | |
| 2008 | D | 157,998 | 110,852 | 271,025 | |
| 2004 | D | 134,136 | 124,977 | 262,779 | |
| 2000 | D | 126,198 | 104,744 | 242,362 | |
| 1996 | D | 112,271 | 94,267 | 230,269 | |
| 1992 | R | 104,195 | 113,545 | 267,427 | |
| 1988 | R | 97,764 | 143,637 | 243,969 | |
| 1984 | R | 85,816 | 167,114 | 253,964 | |
| 1980 | R | 80,796 | 130,774 | 239,241 | |
| 1976 | R | 96,686 | 135,693 | 233,940 | |
| 1972 | R | 81,644 | 150,769 | 236,273 | |
| 1968 | R | 90,648 | 111,787 | 216,469 | |
| 1964 | D | 126,559 | 80,776 | 207,506 | |
| 1960 | R | 94,966 | 108,923 | 203,893 | |
| 1956 | R | 55,112 | 129,655 | 184,766 | |
| 1952 | R | 68,848 | 108,887 | 178,869 | |
| 1948 | R | 58,961 | 77,467 | 141,288 | |
| 1944 | R | 64,242 | 67,799 | 133,574 | |
| 1940 | D | 60,908 | 59,919 | 121,346 | |
| 1936 | D | 56,654 | 44,866 | 106,647 | |
| 1932 | R | 41,853 | 47,546 | 94,495 | |
| 1928 | R | 35,946 | 47,112 | 83,726 | |
| 1924 | R | 12,671 | 38,281 | 58,105 | |
| 1920 | R | 16,384 | 36,384 | 54,761 | |
| 1916 | R | 13,865 | 17,180 | 31,979 | |
| 1912 | D | 10,408 | 8,995 | 27,828 | |
| 1908 | R | 9,862 | 16,283 | 27,335 | |
| 1904 | R | 10,464 | 15,900 | 27,072 | |
| 1900 | R | 10,262 | 14,518 | 25,160 | |
| 1896 | R | 6,926 | 16,723 | 24,882 | |
| 1892 | — | — | — | — | |
| 1888 | D | 10,336 | 10,187 | 20,981 | |
| 1884 | D | 8,946 | 8,453 | 17,400 | |
| 1880 | D | 8,386 | 8,354 | 16,740 | |
| 1876 | D | 7,988 | 7,136 | 15,124 |
Western Connecticut Planning Region is a political anchor of New England. Its population of 627,071 and its concentration of urban, diverse, and college-educated voters have made it a Democratic stronghold for decades running.
The Democratic margin in Western Connecticut Planning Region has been steady. It reached its modern peak at twenty-five points in 2020; the 2024 margin was eighteen points, still in line with the county's long pattern.
Western Connecticut Planning Region's political identity is inseparable from its demographic profile: a 61% non-Hispanic-white share, a median household income of $128,188, and the full diversity of a major metropolitan center. The county's voting pattern resembles other major urban centers most closely — Greater Bridgeport Planning Region and Montgomery County.
