| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 129,376 | 89,680 | 225,654 | |
| 2020 | D | 126,117 | 91,488 | 224,333 | |
| 2016 | D | 93,113 | 83,430 | 195,981 | |
| 2012 | D | 92,747 | 82,376 | 180,180 | |
| 2008 | D | 89,822 | 73,641 | 166,373 | |
| 2004 | R | 68,266 | 75,884 | 146,436 | |
| 2000 | R | 46,055 | 62,429 | 118,537 | |
| 1996 | R | 40,965 | 45,935 | 97,450 | |
| 1992 | D | 38,232 | 35,995 | 99,660 | |
| 1988 | R | 35,703 | 45,967 | 83,066 | |
| 1984 | R | 23,896 | 49,883 | 74,848 | |
| 1980 | R | 17,072 | 36,240 | 64,129 | |
| 1976 | R | 19,005 | 32,169 | 52,983 | |
| 1972 | R | 13,731 | 27,462 | 42,234 | |
| 1968 | R | 9,152 | 18,438 | 29,676 | |
| 1964 | D | 12,776 | 11,636 | 24,585 | |
| 1960 | R | 7,550 | 15,671 | 23,255 | |
| 1956 | R | 5,612 | 14,364 | 20,015 | |
| 1952 | R | 5,266 | 14,484 | 19,860 | |
| 1948 | R | 7,062 | 9,813 | 17,029 | |
| 1944 | R | 5,172 | 9,914 | 15,144 | |
| 1940 | R | 6,402 | 10,720 | 17,248 | |
| 1936 | D | 7,521 | 7,243 | 15,221 | |
| 1932 | R | 6,494 | 7,040 | 14,118 | |
| 1928 | R | 3,203 | 8,213 | 11,578 | |
| 1924 | R | 1,970 | 6,538 | 9,809 | |
| 1920 | R | 2,708 | 5,487 | 8,528 | |
| 1916 | D | 4,868 | 2,797 | 8,183 | |
| 1912 | D | 2,597 | 1,932 | 7,161 | |
| 1908 | R | 3,629 | 4,489 | 8,786 | |
| 1904 | R | 2,070 | 4,138 | 6,606 | |
| 1900 | D | 2,456 | 2,343 | 5,111 | |
| 1896 | D | 3,195 | 734 | 4,053 | |
| 1892 | R | 0 | 975 | 2,265 | |
| 1888 | R | 769 | 1,322 | 2,267 | |
| 1884 | R | 644 | 1,038 | 1,922 | |
| 1880 | R | 388 | 646 | 1,213 | |
| 1876 | — | — | — | — |
Home to Colorado State University, Larimer County has shifted noticeably leftward over two decades as its college-town core grew, yet surrounding rural and mountain communities keep the county's overall margin closer than its D+17.6 figure might suggest about the region.
The 2008 election was the turning point, when the Democratic candidate carried the county by ten points. The 2024 margin was eighteen points, in line with the county's new direction.
The demographics suggest why. A population of 367,368, a 82% non-Hispanic-white share, and a median household income of $93,765 situate the county in the broader realignment patterns of recent cycles. The county's voting pattern over the last decade is most similar to that of Jefferson County and San Luis Obispo County.
