| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 2,919 | 13,669 | 16,706 | |
| 2020 | R | 2,860 | 11,926 | 14,931 | |
| 2016 | R | 2,547 | 10,108 | 12,970 | |
| 2012 | R | 2,752 | 9,132 | 12,045 | |
| 2008 | R | 3,811 | 9,264 | 13,188 | |
| 2004 | R | 3,751 | 9,225 | 13,053 | |
| 2000 | R | 3,524 | 7,054 | 10,735 | |
| 1996 | R | 3,988 | 4,401 | 9,473 | |
| 1992 | D | 3,929 | 3,669 | 10,376 | |
| 1988 | R | 4,381 | 4,796 | 9,198 | |
| 1984 | R | 3,420 | 5,344 | 8,790 | |
| 1980 | D | 4,688 | 4,113 | 8,936 | |
| 1976 | D | 5,327 | 2,680 | 8,032 | |
| 1972 | R | 1,882 | 4,481 | 6,379 | |
| 1968 | D | 3,415 | 1,809 | 6,977 | |
| 1964 | D | 5,130 | 1,557 | 6,696 | |
| 1960 | D | 4,340 | 2,226 | 6,593 | |
| 1956 | D | 4,199 | 2,487 | 6,707 | |
| 1952 | D | 4,504 | 3,242 | 7,747 | |
| 1948 | D | 4,362 | 657 | 5,255 | |
| 1944 | D | 4,876 | 516 | 5,984 | |
| 1940 | D | 6,002 | 627 | 6,629 | |
| 1936 | D | 4,710 | 265 | 4,980 | |
| 1932 | D | 5,297 | 360 | 5,662 | |
| 1928 | R | 2,413 | 2,446 | 4,859 | |
| 1924 | D | 5,778 | 807 | 6,688 | |
| 1920 | D | 3,254 | 1,022 | 5,155 | |
| 1916 | D | 3,951 | 382 | 4,436 | |
| 1912 | D | 2,674 | 129 | 3,084 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Hill County's R+64.3 margin in 2024 places it among the most heavily Republican jurisdictions in Texas, reflecting a broader pattern of rural, small-population counties consolidating sharply away from competitive voting over the past two decades.
The unraveling was not abrupt. The Democratic margin in Hill County peaked at eighty-nine points in 1936; 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 four points. By 2024, the margin had widened further.
The economic and demographic context is severe. Hill County's median household income of $64,591 is among the lowest of any county in the United States; 15% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Freestone County and Madison County.