| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 31,952 | 33,384 | 65,937 | |
| 2020 | D | 41,842 | 25,904 | 68,534 | |
| 2016 | D | 42,307 | 12,947 | 57,585 | |
| 2012 | D | 37,597 | 11,078 | 49,196 | |
| 2008 | D | 33,452 | 13,119 | 46,821 | |
| 2004 | D | 23,654 | 17,753 | 41,556 | |
| 2000 | D | 18,120 | 13,076 | 31,571 | |
| 1996 | D | 18,997 | 4,712 | 24,777 | |
| 1992 | D | 14,509 | 7,789 | 24,866 | |
| 1988 | D | 16,227 | 7,528 | 23,832 | |
| 1984 | D | 12,308 | 8,582 | 20,936 | |
| 1980 | D | 11,856 | 5,421 | 17,593 | |
| 1976 | D | 10,362 | 4,222 | 14,698 | |
| 1972 | D | 8,435 | 6,011 | 14,458 | |
| 1968 | D | 9,419 | 2,103 | 11,826 | |
| 1964 | D | 10,073 | 1,094 | 11,182 | |
| 1960 | D | 10,059 | 1,802 | 11,865 | |
| 1956 | D | 5,827 | 2,744 | 8,587 | |
| 1952 | D | 6,208 | 2,784 | 8,996 | |
| 1948 | D | 4,595 | 1,004 | 5,695 | |
| 1944 | D | 4,742 | 776 | 5,571 | |
| 1940 | D | 4,147 | 775 | 4,926 | |
| 1936 | D | 3,594 | 696 | 4,290 | |
| 1932 | D | 4,299 | 657 | 4,969 | |
| 1928 | D | 1,615 | 767 | 2,385 | |
| 1924 | D | 1,313 | 429 | 1,794 | |
| 1920 | D | 633 | 468 | 1,117 | |
| 1916 | D | 676 | 472 | 1,148 | |
| 1912 | R | 654 | 888 | 1,577 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Webb County, anchored by Laredo on the Rio Grande, voted Democratic for decades before narrowing to R+2.2 in 2024—one of the steepest rightward shifts among majority-Hispanic counties in Texas.
The Democratic margin in Webb County peaked at eighty points in 1964. By 2024 the county had flipped, voting Republican for the first time in many years. The 2024 margin was two points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Webb County's median household income of $63,058 sits well below state and national norms, and 21% 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 Hidalgo County and Maverick County.