| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 7,995 | 26,213 | 35,006 | |
| 2020 | R | 8,364 | 26,499 | 35,787 | |
| 2016 | R | 6,311 | 23,927 | 32,431 | |
| 2012 | R | 6,862 | 22,558 | 30,140 | |
| 2008 | R | 9,236 | 20,488 | 30,134 | |
| 2004 | R | 5,977 | 22,136 | 28,360 | |
| 2000 | R | 5,785 | 19,040 | 25,284 | |
| 1996 | R | 6,166 | 15,084 | 23,945 | |
| 1992 | R | 5,307 | 14,179 | 24,683 | |
| 1988 | R | 5,321 | 17,761 | 23,163 | |
| 1984 | R | 4,877 | 17,560 | 22,547 | |
| 1980 | R | 5,684 | 15,633 | 22,730 | |
| 1976 | R | 7,328 | 14,505 | 22,124 | |
| 1972 | R | 4,233 | 16,216 | 20,545 | |
| 1968 | R | 5,342 | 12,633 | 19,744 | |
| 1964 | R | 8,759 | 10,488 | 19,388 | |
| 1960 | R | 5,839 | 13,539 | 19,591 | |
| 1956 | R | 4,904 | 12,777 | 17,824 | |
| 1952 | R | 4,677 | 11,521 | 16,710 | |
| 1948 | R | 5,102 | 9,327 | 14,855 | |
| 1944 | R | 4,865 | 9,577 | 14,708 | |
| 1940 | R | 5,768 | 9,879 | 15,760 | |
| 1936 | R | 6,890 | 8,182 | 15,179 | |
| 1932 | D | 7,475 | 7,063 | 14,791 | |
| 1928 | R | 4,537 | 7,973 | 12,620 | |
| 1924 | R | 4,384 | 6,819 | 11,690 | |
| 1920 | R | 4,836 | 8,326 | 13,504 | |
| 1916 | R | 3,447 | 4,025 | 7,865 | |
| 1912 | D | 2,817 | 1,767 | 7,220 | |
| 1908 | R | 3,362 | 4,377 | 8,039 | |
| 1904 | R | 2,913 | 4,550 | 7,861 | |
| 1900 | R | 3,265 | 4,422 | 7,859 | |
| 1896 | R | 3,372 | 4,342 | 7,808 | |
| 1892 | R | 3,064 | 3,823 | 7,181 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Kosciusko County, anchored by Warsaw's orthopedic manufacturing hub, delivered an R+52.2 margin in 2024 — a result consistent with the broader pattern of rural northern Indiana counties where Republican candidates routinely clear 70 percent of the vote.
The Republican margin in Kosciusko County reached its widest at fifty-eight points in 1972. The margin in 2024 was fifty-two points, in line with the county's deep historical pattern.
Kosciusko County's loyalty is rooted in its place. Median household income of $75,317, a 87% non-Hispanic-white share, and a population of 80,442 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 Madison County and Augusta County.