| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 4,708 | 14,983 | 19,867 | |
| 2020 | R | 5,101 | 13,800 | 19,151 | |
| 2016 | R | 4,002 | 11,994 | 16,433 | |
| 2012 | R | 4,350 | 10,847 | 15,364 | |
| 2008 | R | 5,400 | 10,810 | 16,321 | |
| 2004 | R | 5,259 | 10,715 | 16,034 | |
| 2000 | R | 5,366 | 8,358 | 13,890 | |
| 1996 | D | 6,078 | 5,236 | 12,502 | |
| 1992 | D | 6,006 | 4,897 | 14,721 | |
| 1988 | D | 6,749 | 6,445 | 13,232 | |
| 1984 | R | 5,672 | 7,816 | 13,509 | |
| 1980 | D | 6,988 | 5,400 | 12,591 | |
| 1976 | D | 6,995 | 4,012 | 11,068 | |
| 1972 | R | 3,246 | 6,039 | 9,303 | |
| 1968 | D | 5,296 | 2,845 | 10,388 | |
| 1964 | D | 6,811 | 2,139 | 8,953 | |
| 1960 | D | 5,540 | 3,361 | 8,901 | |
| 1956 | D | 4,723 | 3,193 | 7,931 | |
| 1952 | D | 8,745 | 3,592 | 12,345 | |
| 1948 | D | 4,679 | 1,188 | 6,494 | |
| 1944 | D | 6,298 | 449 | 7,401 | |
| 1940 | D | 7,683 | 721 | 8,415 | |
| 1936 | D | 5,815 | 293 | 6,120 | |
| 1932 | D | 6,392 | 512 | 6,915 | |
| 1928 | D | 3,648 | 3,341 | 6,989 | |
| 1924 | D | 6,408 | 996 | 7,481 | |
| 1920 | D | 3,328 | 821 | 5,172 | |
| 1916 | D | 3,527 | 294 | 3,927 | |
| 1912 | D | 2,589 | 165 | 3,048 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Navarro County, anchored by Corsicana, shifted steadily rightward over the past two decades; its R+51.8 margin in 2024 reflects a rural realignment driven by a shrinking urban core and declining ticket-splitting.
The unraveling was not abrupt. The Democratic margin in Navarro County peaked at ninety points in 1936; it narrowed steadily over the late twentieth century. The 2000 election delivered the county to the Republican party for the first time in many years, by a margin of twenty-two points. By 2024, the margin had widened further.
The economic and demographic context is severe. Navarro County's median household income of $63,111 is among the lowest of any county in the United States; 17% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Nolan County and Shelby County.