| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 2,511 | 8,490 | 11,178 | |
| 2020 | R | 2,686 | 8,545 | 11,438 | |
| 2016 | R | 2,584 | 7,631 | 10,690 | |
| 2012 | R | 3,509 | 6,466 | 9,975 | |
| 2008 | R | 4,268 | 6,905 | 11,173 | |
| 2004 | R | 5,086 | 7,443 | 12,529 | |
| 2000 | D | 5,647 | 5,625 | 11,411 | |
| 1996 | D | 5,844 | 4,127 | 11,504 | |
| 1992 | D | 6,304 | 4,141 | 13,209 | |
| 1988 | D | 6,658 | 5,026 | 11,729 | |
| 1984 | R | 5,781 | 7,666 | 13,505 | |
| 1980 | R | 6,143 | 6,362 | 12,919 | |
| 1976 | D | 7,446 | 4,985 | 12,515 | |
| 1972 | R | 3,657 | 8,348 | 12,163 | |
| 1968 | R | 4,820 | 5,000 | 11,241 | |
| 1964 | D | 7,589 | 4,090 | 11,679 | |
| 1960 | R | 5,705 | 6,520 | 12,225 | |
| 1956 | R | 5,721 | 6,730 | 12,451 | |
| 1952 | R | 6,692 | 7,211 | 13,903 | |
| 1948 | D | 7,243 | 4,304 | 11,547 | |
| 1944 | D | 5,876 | 5,056 | 10,945 | |
| 1940 | D | 7,873 | 5,738 | 13,646 | |
| 1936 | D | 7,658 | 4,697 | 12,412 | |
| 1932 | D | 8,175 | 3,210 | 11,385 | |
| 1928 | R | 4,488 | 8,144 | 12,720 | |
| 1924 | R | 4,522 | 5,197 | 10,377 | |
| 1920 | R | 3,974 | 5,270 | 9,616 | |
| 1916 | D | 1,875 | 1,642 | 3,745 | |
| 1912 | D | 1,384 | 1,315 | 2,870 | |
| 1908 | D | 1,297 | 1,174 | 2,566 | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Ottawa County, in Oklahoma's northeastern corner near the Missouri and Arkansas borders, has shifted dramatically toward Republican margins over the past decade, posting a 53-point gap in 2024 despite a historically mixed past tied to tribal land and lead-mining communities.
The Democratic margin in Ottawa County peaked at forty-four points in 1932. By 2004 the county had flipped, voting Republican for the first time in many years. The 2024 margin was fifty-three points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Ottawa County's median household income of $49,947 sits well below state and national norms, and 21% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country. The county's voting pattern over the last decade is most similar to that of Haskell County and Okfuskee County.