| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 117,877 | 93,772 | 215,498 | |
| 2020 | D | 129,538 | 92,358 | 225,030 | |
| 2016 | D | 108,632 | 86,787 | 203,655 | |
| 2012 | D | 113,544 | 78,326 | 193,988 | |
| 2008 | D | 123,371 | 79,560 | 205,504 | |
| 2004 | D | 105,485 | 88,123 | 197,232 | |
| 2000 | D | 103,149 | 68,961 | 182,897 | |
| 1996 | D | 93,042 | 59,469 | 174,460 | |
| 1992 | D | 85,108 | 74,857 | 204,534 | |
| 1988 | R | 85,715 | 93,821 | 181,906 | |
| 1984 | R | 73,019 | 113,026 | 186,847 | |
| 1980 | R | 69,017 | 87,929 | 178,686 | |
| 1976 | R | 82,583 | 92,325 | 176,128 | |
| 1972 | R | 71,554 | 104,483 | 178,276 | |
| 1968 | D | 82,033 | 70,140 | 163,614 | |
| 1964 | D | 111,096 | 50,864 | 162,090 | |
| 1960 | D | 92,467 | 73,165 | 165,634 | |
| 1956 | R | 55,605 | 97,524 | 153,130 | |
| 1952 | R | 67,004 | 84,497 | 152,059 | |
| 1948 | R | 59,331 | 61,334 | 123,849 | |
| 1944 | D | 60,700 | 55,124 | 116,697 | |
| 1940 | D | 60,537 | 51,821 | 112,616 | |
| 1936 | D | 55,927 | 39,048 | 99,716 | |
| 1932 | D | 41,253 | 40,481 | 85,460 | |
| 1928 | R | 38,212 | 41,474 | 80,341 | |
| 1924 | R | 17,037 | 34,811 | 59,025 | |
| 1920 | R | 18,114 | 32,771 | 53,378 | |
| 1916 | R | 14,746 | 15,131 | 31,083 | |
| 1912 | D | 10,809 | 9,884 | 27,766 | |
| 1908 | R | 10,374 | 16,375 | 28,069 | |
| 1904 | R | 10,505 | 16,016 | 27,846 | |
| 1900 | R | 11,634 | 14,418 | 26,589 | |
| 1896 | R | 4,144 | 7,920 | 12,528 | |
| 1892 | — | — | — | — | |
| 1888 | D | 10,918 | 9,967 | 21,435 | |
| 1884 | D | 9,839 | 8,626 | 18,465 | |
| 1880 | D | 9,234 | 8,568 | 17,802 | |
| 1876 | D | 8,480 | 7,308 | 15,789 |
Naugatuck Valley Planning Region sits in New England. Its political identity has been Democratic for as long as anyone now living can remember. 5 consecutive presidential elections in modern records have gone for the Democratic candidate, often by margins that would be considered landslide territory anywhere else.
The Democratic margin in Naugatuck Valley Planning Region reached its widest at thirty-seven points in 1964. The margin in 2024 was eleven points — still decisive.
Naugatuck Valley Planning Region's loyalty is rooted in its place. Median household income of $86,191, a 64% non-Hispanic-white share, and a population of 454,969 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of South Central Connecticut Planning Region and Camden County.
