| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 15,128 | 14,493 | 30,376 | |
| 2020 | D | 15,427 | 14,717 | 30,904 | |
| 2016 | R | 11,271 | 13,132 | 26,470 | |
| 2012 | R | 11,305 | 12,535 | 24,408 | |
| 2008 | R | 11,357 | 11,359 | 23,082 | |
| 2004 | R | 9,228 | 11,123 | 20,647 | |
| 2000 | R | 6,087 | 9,103 | 17,104 | |
| 1996 | R | 5,722 | 6,281 | 14,138 | |
| 1992 | D | 5,082 | 4,404 | 13,976 | |
| 1988 | R | 4,620 | 6,358 | 11,114 | |
| 1984 | R | 3,076 | 7,111 | 10,285 | |
| 1980 | R | 2,639 | 5,416 | 9,325 | |
| 1976 | R | 2,852 | 4,699 | 7,866 | |
| 1972 | R | 2,088 | 4,452 | 6,718 | |
| 1968 | R | 2,273 | 3,157 | 6,043 | |
| 1964 | D | 3,196 | 2,282 | 5,488 | |
| 1960 | R | 2,313 | 3,215 | 5,539 | |
| 1956 | R | 1,953 | 3,332 | 5,297 | |
| 1952 | R | 1,777 | 3,914 | 5,719 | |
| 1948 | R | 2,364 | 2,416 | 4,822 | |
| 1944 | R | 1,865 | 2,588 | 4,464 | |
| 1940 | R | 2,141 | 2,894 | 5,061 | |
| 1936 | D | 2,406 | 1,945 | 4,528 | |
| 1932 | D | 2,946 | 1,734 | 4,810 | |
| 1928 | R | 1,562 | 2,435 | 4,056 | |
| 1924 | R | 917 | 1,934 | 3,772 | |
| 1920 | R | 1,489 | 1,912 | 3,520 | |
| 1916 | D | 2,479 | 1,139 | 3,815 | |
| 1912 | D | 1,806 | 824 | 3,905 | |
| 1908 | D | 1,898 | 1,504 | 3,582 | |
| 1904 | R | 1,286 | 1,639 | 3,087 | |
| 1900 | D | 1,700 | 826 | 2,558 | |
| 1896 | D | 2,065 | 173 | 2,274 | |
| 1892 | R | 0 | 634 | 1,349 | |
| 1888 | R | 820 | 1,110 | 1,960 | |
| 1884 | R | 139 | 245 | 384 | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Garfield County's economy has long centered on natural gas extraction in the Piceance Basin, yet its 2024 presidential result landed narrowly Democratic — a shift driven partly by resort-economy migration from neighboring Pitkin County spilling into communities like Glenwood Springs.
The Democratic margin in Garfield County has rarely exceeded eighty-three points in modern history; the Republican margin has rarely exceeded forty-seven points. 2024 delivered the county to the Democratic candidate by two points.
Garfield County's demographics resemble the country more than they resemble most counties. A 69% non-Hispanic-white share, a 8% poverty rate, and a median household income of $91,131 — all within the broad national range. The county's voting pattern over the last decade is most similar to that of Grand County and Butte County.