| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,458 | 6,907 | 8,441 | |
| 2020 | R | 1,380 | 6,619 | 8,104 | |
| 2016 | R | 1,272 | 5,895 | 7,453 | |
| 2012 | R | 2,122 | 4,992 | 7,279 | |
| 2008 | R | 2,656 | 4,895 | 7,683 | |
| 2004 | R | 2,407 | 4,788 | 7,259 | |
| 2000 | R | 2,311 | 3,723 | 6,219 | |
| 1996 | R | 2,277 | 2,554 | 5,674 | |
| 1992 | D | 2,533 | 2,116 | 6,051 | |
| 1988 | R | 2,293 | 2,898 | 5,217 | |
| 1984 | R | 1,902 | 3,577 | 5,479 | |
| 1980 | R | 2,011 | 3,297 | 5,438 | |
| 1976 | D | 2,453 | 2,430 | 4,910 | |
| 1972 | R | 1,085 | 3,120 | 4,205 | |
| 1968 | R | 1,237 | 2,835 | 4,537 | |
| 1964 | R | 1,983 | 2,268 | 4,251 | |
| 1960 | R | 1,482 | 3,522 | 5,004 | |
| 1956 | R | 1,600 | 2,987 | 4,587 | |
| 1952 | R | 1,258 | 3,459 | 4,726 | |
| 1948 | R | 1,590 | 2,695 | 4,296 | |
| 1944 | R | 1,064 | 3,232 | 4,306 | |
| 1940 | R | 1,566 | 3,859 | 5,435 | |
| 1936 | R | 1,749 | 3,066 | 4,828 | |
| 1932 | D | 2,143 | 1,958 | 4,136 | |
| 1928 | R | 931 | 2,835 | 3,783 | |
| 1924 | R | 1,304 | 2,188 | 3,585 | |
| 1920 | R | 1,100 | 2,665 | 3,811 | |
| 1916 | R | 1,022 | 1,428 | 2,509 | |
| 1912 | R | 870 | 1,051 | 2,443 | |
| 1908 | R | 955 | 1,609 | 2,597 | |
| 1904 | R | 797 | 1,711 | 2,640 | |
| 1900 | R | 1,238 | 1,506 | 2,812 | |
| 1896 | D | 1,525 | 1,466 | 3,007 | |
| 1892 | R | 586 | 1,174 | 2,359 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Dallas County's R+64.5 margin in 2024 reflects the sharp Republican consolidation that has reshaped small, sparsely populated Ozark-edge counties over the past two decades, leaving Democrats with minimal competitive foothold.
The Democratic margin in Dallas County peaked at seven points in 1992. By 1996 the county had flipped, voting Republican for the first time in many years. The 2024 margin was sixty-five points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Dallas County's median household income of $53,464 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 Texas County and Stoddard County.