| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 153 | 1,038 | 1,198 | |
| 2020 | R | 197 | 1,058 | 1,268 | |
| 2016 | R | 148 | 885 | 1,068 | |
| 2012 | R | 194 | 793 | 1,001 | |
| 2008 | R | 257 | 807 | 1,077 | |
| 2004 | R | 270 | 911 | 1,193 | |
| 2000 | R | 268 | 818 | 1,103 | |
| 1996 | R | 434 | 488 | 1,032 | |
| 1992 | D | 489 | 414 | 1,236 | |
| 1988 | D | 643 | 617 | 1,263 | |
| 1984 | R | 580 | 821 | 1,408 | |
| 1980 | D | 702 | 700 | 1,417 | |
| 1976 | D | 715 | 474 | 1,195 | |
| 1972 | R | 350 | 709 | 1,059 | |
| 1968 | D | 502 | 411 | 1,110 | |
| 1964 | D | 948 | 307 | 1,256 | |
| 1960 | D | 718 | 522 | 1,242 | |
| 1956 | R | 567 | 574 | 1,142 | |
| 1952 | R | 708 | 808 | 1,516 | |
| 1948 | D | 1,156 | 174 | 1,346 | |
| 1944 | D | 1,090 | 151 | 1,364 | |
| 1940 | D | 1,310 | 189 | 1,500 | |
| 1936 | D | 1,089 | 76 | 1,165 | |
| 1932 | D | 1,126 | 44 | 1,174 | |
| 1928 | R | 426 | 446 | 875 | |
| 1924 | D | 668 | 90 | 781 | |
| 1920 | D | 405 | 151 | 675 | |
| 1916 | D | 418 | 36 | 509 | |
| 1912 | D | 326 | 16 | 461 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Concho County's roughly 4,000 residents delivered a 74-point Republican margin in 2024, typical of the sparsely settled ranchland counties of west-central Texas where GOP dominance has deepened steadily over two decades.
The unraveling was not abrupt. The Democratic margin in Concho County peaked at ninety-two 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 five points. By 2024, the margin had widened further.
The economic and demographic context is severe. Concho County's median household income of $65,795 is among the lowest of any county in the United States; 11% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of McCulloch County and Franklin County.