| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 363 | 3,819 | 4,201 | |
| 2020 | R | 331 | 3,418 | 3,782 | |
| 2016 | R | 314 | 2,973 | 3,350 | |
| 2012 | R | 303 | 2,580 | 2,908 | |
| 2008 | R | 470 | 2,528 | 3,023 | |
| 2004 | R | 643 | 2,470 | 3,126 | |
| 2000 | R | 822 | 2,107 | 2,974 | |
| 1996 | R | 1,019 | 1,162 | 2,487 | |
| 1992 | D | 1,254 | 1,041 | 3,347 | |
| 1988 | R | 1,521 | 1,542 | 3,074 | |
| 1984 | R | 945 | 1,825 | 2,779 | |
| 1980 | R | 1,349 | 1,482 | 2,877 | |
| 1976 | D | 1,814 | 1,049 | 2,871 | |
| 1972 | R | 775 | 1,719 | 2,507 | |
| 1968 | D | 1,133 | 966 | 2,611 | |
| 1964 | D | 1,594 | 847 | 2,444 | |
| 1960 | R | 1,079 | 1,342 | 2,432 | |
| 1956 | R | 997 | 1,327 | 2,347 | |
| 1952 | R | 1,130 | 1,406 | 2,539 | |
| 1948 | D | 1,426 | 265 | 1,817 | |
| 1944 | D | 1,484 | 217 | 1,964 | |
| 1940 | D | 2,046 | 305 | 2,352 | |
| 1936 | D | 1,113 | 183 | 1,306 | |
| 1932 | D | 1,429 | 189 | 1,634 | |
| 1928 | R | 450 | 1,068 | 1,521 | |
| 1924 | D | 1,154 | 290 | 1,470 | |
| 1920 | D | 566 | 253 | 881 | |
| 1916 | D | 862 | 121 | 1,102 | |
| 1912 | D | 755 | 85 | 1,157 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Jack County's 2024 presidential margin of R+82.3 places it among the most one-sided counties in the state, reflecting the consolidation of rural, low-density North Texas toward a single-party preference over the past two decades.
The unraveling was not abrupt. The Democratic margin in Jack County peaked at seventy-six points in 1932; it narrowed steadily over the late twentieth century. The 1996 election delivered the county to the Republican party for the first time in many years, by a margin of six points. By 2024, the margin had widened further.
The economic and demographic context is severe. Jack County's median household income of $68,079 is among the lowest of any county in the United States; 13% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Franklin County and Montague County.