| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 104,517 | 110,760 | 217,265 | |
| 2020 | D | 128,199 | 90,527 | 220,884 | |
| 2016 | D | 118,809 | 48,642 | 174,408 | |
| 2012 | D | 97,969 | 39,865 | 139,322 | |
| 2008 | D | 90,261 | 39,668 | 130,784 | |
| 2004 | D | 62,369 | 50,931 | 113,683 | |
| 2000 | D | 61,390 | 38,301 | 101,050 | |
| 1996 | D | 56,335 | 24,437 | 84,727 | |
| 1992 | D | 51,205 | 26,976 | 88,160 | |
| 1988 | D | 54,330 | 29,246 | 83,870 | |
| 1984 | D | 44,147 | 35,059 | 79,432 | |
| 1980 | D | 34,542 | 25,808 | 61,717 | |
| 1976 | D | 35,021 | 19,199 | 54,593 | |
| 1972 | R | 18,366 | 22,920 | 41,499 | |
| 1968 | D | 20,087 | 14,455 | 37,111 | |
| 1964 | D | 22,110 | 11,563 | 33,756 | |
| 1960 | D | 18,663 | 13,628 | 32,406 | |
| 1956 | R | 9,804 | 13,270 | 23,327 | |
| 1952 | R | 9,251 | 15,303 | 24,602 | |
| 1948 | D | 9,526 | 6,220 | 16,018 | |
| 1944 | D | 7,250 | 4,080 | 12,234 | |
| 1940 | D | 7,471 | 4,787 | 12,285 | |
| 1936 | D | 6,782 | 2,962 | 10,053 | |
| 1932 | D | 9,695 | 2,969 | 12,784 | |
| 1928 | R | 4,034 | 4,285 | 8,335 | |
| 1924 | D | 3,662 | 996 | 4,872 | |
| 1920 | D | 2,409 | 1,108 | 3,559 | |
| 1916 | D | 1,364 | 260 | 1,657 | |
| 1912 | D | 1,203 | 39 | 1,390 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Hidalgo County, home to McAllen and one of Texas's most populous Latino-majority counties, shifted from a double-digit Democratic margin in 2016 to R+2.9 in 2024, marking a dramatic realignment in a region long considered safely Democratic.
The Democratic margin in Hidalgo County peaked at eighty-four points in 1912. By 2024 the county had flipped, voting Republican for the first time in many years. The 2024 margin was three points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Hidalgo County's median household income of $54,338 sits well below state and national norms, and 27% 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 Willacy County and Webb County.