| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 7,765 | 26,965 | 35,423 | |
| 2020 | R | 7,781 | 27,512 | 36,159 | |
| 2016 | R | 6,040 | 23,671 | 31,453 | |
| 2012 | R | 7,969 | 19,591 | 28,325 | |
| 2008 | R | 10,330 | 18,129 | 28,811 | |
| 2004 | R | 6,650 | 19,197 | 26,029 | |
| 2000 | R | 6,228 | 15,286 | 22,036 | |
| 1996 | R | 5,812 | 12,872 | 21,596 | |
| 1992 | R | 4,690 | 10,939 | 21,107 | |
| 1988 | R | 5,375 | 14,284 | 19,736 | |
| 1984 | R | 4,627 | 14,884 | 19,607 | |
| 1980 | R | 5,439 | 13,321 | 19,438 | |
| 1976 | R | 7,181 | 10,983 | 18,309 | |
| 1972 | R | 3,390 | 11,980 | 15,435 | |
| 1968 | R | 4,042 | 8,944 | 16,130 | |
| 1964 | R | 7,011 | 8,347 | 15,428 | |
| 1960 | R | 5,375 | 9,416 | 14,860 | |
| 1956 | R | 4,735 | 8,318 | 13,103 | |
| 1952 | R | 4,755 | 8,222 | 13,072 | |
| 1948 | R | 4,428 | 5,677 | 10,297 | |
| 1944 | R | 4,156 | 6,115 | 10,348 | |
| 1940 | R | 4,895 | 6,613 | 11,544 | |
| 1936 | R | 5,451 | 5,793 | 11,328 | |
| 1932 | D | 5,775 | 4,825 | 10,795 | |
| 1928 | R | 3,933 | 5,464 | 9,460 | |
| 1924 | R | 4,042 | 5,328 | 9,586 | |
| 1920 | R | 4,254 | 5,634 | 10,069 | |
| 1916 | R | 2,616 | 2,860 | 5,713 | |
| 1912 | D | 2,608 | 1,353 | 5,584 | |
| 1908 | R | 2,789 | 3,074 | 6,030 | |
| 1904 | R | 2,428 | 3,119 | 5,763 | |
| 1900 | R | 2,632 | 2,904 | 5,652 | |
| 1896 | R | 2,414 | 2,688 | 5,146 | |
| 1892 | R | 2,014 | 2,377 | 4,635 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Morgan County, directly south of Indianapolis, has shifted steadily toward lopsided Republican margins over the past two decades, with its 2024 presidential result of R+54.3 placing it among the state's most one-sided exurban counties.
The Republican margin in Morgan County reached its widest at fifty-six points in 2016. The margin in 2024 was fifty-four points, in line with the county's deep historical pattern.
Morgan County's loyalty is rooted in its place. Median household income of $79,429, a 94% non-Hispanic-white share, and a population of 72,659 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 Page County and Huntington County.
