| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 49,432 | 67,225 | 119,294 | |
| 2020 | R | 49,827 | 66,677 | 119,778 | |
| 2016 | R | 38,829 | 62,538 | 109,450 | |
| 2012 | R | 34,771 | 59,116 | 93,887 | |
| 2008 | R | 39,681 | 64,749 | 104,430 | |
| 2004 | R | 34,007 | 65,720 | 99,727 | |
| 2000 | R | 27,792 | 47,393 | 76,171 | |
| 1996 | R | 26,038 | 36,457 | 69,783 | |
| 1992 | R | 24,404 | 35,561 | 80,629 | |
| 1988 | R | 22,067 | 36,313 | 58,933 | |
| 1984 | R | 16,512 | 42,806 | 59,705 | |
| 1980 | R | 14,536 | 31,178 | 50,401 | |
| 1976 | R | 20,054 | 22,098 | 43,281 | |
| 1972 | R | 11,126 | 25,777 | 37,518 | |
| 1968 | R | 8,617 | 12,446 | 25,774 | |
| 1964 | D | 11,599 | 9,656 | 21,255 | |
| 1960 | R | 6,397 | 9,292 | 15,689 | |
| 1956 | R | 5,987 | 7,766 | 13,753 | |
| 1952 | R | 6,190 | 8,149 | 14,339 | |
| 1948 | D | 6,556 | 3,671 | 10,227 | |
| 1944 | D | 5,240 | 3,642 | 8,903 | |
| 1940 | D | 5,933 | 3,660 | 9,650 | |
| 1936 | D | 6,304 | 2,643 | 9,022 | |
| 1932 | D | 5,969 | 1,868 | 7,837 | |
| 1928 | R | 2,291 | 3,738 | 6,093 | |
| 1924 | D | 2,841 | 1,672 | 5,008 | |
| 1920 | D | 2,397 | 2,283 | 4,985 | |
| 1916 | D | 1,753 | 885 | 3,235 | |
| 1912 | D | 1,471 | 938 | 2,865 | |
| 1908 | D | 1,437 | 1,092 | 3,006 | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Cleveland County anchors Norman and the University of Oklahoma, giving it a younger, more educated profile than most of rural Oklahoma — yet it still delivered a 14.9-point Republican margin in 2024, reflecting the state's broader partisan realignment.
The Republican margin in Cleveland County reached its widest at forty-four points in 1984. The margin in 2024 was fifteen points, in line with the county's deep historical pattern.
Cleveland County's loyalty is rooted in its place. Median household income of $77,068, a 70% non-Hispanic-white share, and a population of 300,047 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 Oldham County and Forsyth County.
