| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 2,306 | 3,743 | 6,194 | |
| 2020 | R | 2,495 | 3,660 | 6,305 | |
| 2016 | R | 2,001 | 3,085 | 5,534 | |
| 2012 | R | 2,478 | 2,918 | 5,533 | |
| 2008 | R | 2,448 | 2,930 | 5,444 | |
| 2004 | R | 2,006 | 3,448 | 5,526 | |
| 2000 | R | 1,707 | 3,111 | 5,075 | |
| 1996 | R | 1,720 | 2,129 | 4,301 | |
| 1992 | R | 1,541 | 1,927 | 4,533 | |
| 1988 | R | 1,545 | 2,626 | 4,235 | |
| 1984 | R | 1,104 | 3,122 | 4,262 | |
| 1980 | R | 1,370 | 2,844 | 4,488 | |
| 1976 | R | 1,475 | 2,627 | 4,212 | |
| 1972 | R | 1,029 | 2,787 | 3,999 | |
| 1968 | R | 1,562 | 2,442 | 4,187 | |
| 1964 | D | 2,161 | 1,699 | 3,867 | |
| 1960 | R | 1,782 | 2,524 | 4,312 | |
| 1956 | R | 1,441 | 2,816 | 4,264 | |
| 1952 | R | 1,350 | 3,201 | 4,566 | |
| 1948 | R | 1,814 | 2,049 | 3,876 | |
| 1944 | R | 1,325 | 2,567 | 3,900 | |
| 1940 | R | 2,242 | 3,075 | 5,357 | |
| 1936 | D | 2,574 | 1,884 | 4,524 | |
| 1932 | D | 2,539 | 1,557 | 4,258 | |
| 1928 | R | 1,226 | 2,254 | 3,520 | |
| 1924 | R | 922 | 1,572 | 2,938 | |
| 1920 | R | 985 | 1,660 | 2,721 | |
| 1916 | D | 1,756 | 886 | 2,717 | |
| 1912 | D | 1,286 | 698 | 2,794 | |
| 1908 | D | 1,139 | 1,122 | 2,313 | |
| 1904 | R | 690 | 1,417 | 2,181 | |
| 1900 | D | 1,118 | 752 | 1,907 | |
| 1896 | D | 1,428 | 176 | 1,628 | |
| 1892 | R | 0 | 539 | 1,104 | |
| 1888 | R | 261 | 454 | 738 | |
| 1884 | R | 289 | 448 | 753 | |
| 1880 | R | 198 | 298 | 496 | |
| 1876 | — | — | — | — |
Rio Grande sits in Colorado's high-desert San Luis Valley, where irrigated potato and barley farming dominate the economy. Voters have shifted steadily toward Republican margins over the past decade, hitting R+23 in 2024.
The Republican margin in Rio Grande County reached its widest at forty-nine points in 1892. The margin in 2024 was twenty-three points, in line with the county's deep historical pattern.
Rio Grande County's loyalty is rooted in its place. Median household income of $64,411, a 73% non-Hispanic-white share, and a population of 11,321 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of Leake County and Monroe County.
