| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 69,960 | 90,283 | 163,650 | |
| 2020 | R | 73,189 | 92,083 | 169,082 | |
| 2016 | R | 55,222 | 83,801 | 148,343 | |
| 2012 | R | 60,036 | 84,613 | 147,246 | |
| 2008 | R | 71,263 | 77,793 | 150,324 | |
| 2004 | R | 46,710 | 82,013 | 129,609 | |
| 2000 | R | 41,636 | 70,426 | 114,320 | |
| 1996 | R | 41,450 | 59,255 | 110,645 | |
| 1992 | R | 39,629 | 55,003 | 121,577 | |
| 1988 | R | 39,238 | 74,638 | 114,935 | |
| 1984 | R | 38,462 | 75,505 | 114,975 | |
| 1980 | R | 37,765 | 68,524 | 118,898 | |
| 1976 | R | 44,744 | 71,321 | 117,769 | |
| 1972 | R | 38,621 | 76,924 | 116,199 | |
| 1968 | R | 40,411 | 59,211 | 108,954 | |
| 1964 | D | 50,706 | 49,284 | 100,353 | |
| 1960 | R | 39,235 | 60,103 | 99,618 | |
| 1956 | R | 25,444 | 58,210 | 83,844 | |
| 1952 | R | 27,506 | 54,877 | 82,941 | |
| 1948 | R | 31,239 | 37,494 | 69,436 | |
| 1944 | R | 30,445 | 41,907 | 72,709 | |
| 1940 | R | 29,967 | 40,430 | 70,709 | |
| 1936 | D | 39,151 | 24,765 | 66,146 | |
| 1932 | D | 38,447 | 27,065 | 66,562 | |
| 1928 | R | 26,292 | 34,234 | 60,720 | |
| 1924 | R | 17,244 | 25,207 | 46,573 | |
| 1920 | R | 13,804 | 24,208 | 42,177 | |
| 1916 | R | 9,470 | 10,169 | 22,090 | |
| 1912 | D | 8,659 | 3,423 | 18,569 | |
| 1908 | D | 12,145 | 9,468 | 22,513 | |
| 1904 | R | 9,250 | 10,261 | 20,367 | |
| 1900 | D | 10,764 | 8,250 | 19,309 | |
| 1896 | D | 9,909 | 8,467 | 18,632 | |
| 1892 | D | 10,010 | 5,486 | 16,121 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Allen County's urban core in Fort Wayne adds demographic complexity to an otherwise reliably Republican-leaning region, with the 2024 presidential margin settling at R+12.5 despite a growing Hispanic population concentrated in the city.
The Republican margin in Allen County reached its widest at thirty-nine points in 1956. The margin in 2024 was twelve points, in line with the county's deep historical pattern.
Allen County's loyalty is rooted in its place. Median household income of $70,737, a 71% non-Hispanic-white share, and a population of 392,378 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 Emmet County and Spotsylvania County.
