| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 445 | 2,906 | 3,456 | |
| 2020 | R | 431 | 2,906 | 3,416 | |
| 2016 | R | 271 | 2,275 | 3,035 | |
| 2012 | R | 386 | 2,608 | 3,052 | |
| 2008 | R | 553 | 2,656 | 3,302 | |
| 2004 | R | 491 | 2,753 | 3,281 | |
| 2000 | R | 475 | 2,601 | 3,177 | |
| 1996 | R | 841 | 1,740 | 3,120 | |
| 1992 | R | 562 | 1,350 | 3,236 | |
| 1988 | R | 867 | 2,239 | 3,144 | |
| 1984 | R | 535 | 3,032 | 3,597 | |
| 1980 | R | 481 | 3,234 | 3,892 | |
| 1976 | R | 1,110 | 2,253 | 3,475 | |
| 1972 | R | 614 | 2,069 | 2,958 | |
| 1968 | R | 727 | 1,731 | 2,785 | |
| 1964 | D | 1,422 | 1,303 | 2,725 | |
| 1960 | R | 1,293 | 1,544 | 2,837 | |
| 1956 | R | 950 | 1,668 | 2,618 | |
| 1952 | R | 809 | 1,788 | 2,598 | |
| 1948 | D | 475 | 447 | 930 | |
| 1944 | D | 516 | 462 | 978 | |
| 1940 | D | 658 | 390 | 1,049 | |
| 1936 | D | 640 | 321 | 962 | |
| 1932 | D | 499 | 409 | 920 | |
| 1928 | R | 291 | 471 | 766 | |
| 1924 | R | 148 | 508 | 864 | |
| 1920 | R | 181 | 541 | 722 | |
| 1916 | — | — | — | — | |
| 1912 | — | — | — | — | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
With roughly 7,300 residents spread across high desert and range land in southeastern Idaho, Caribou County recorded a 71.5-point Republican presidential margin in 2024, placing it among the most one-sided counties in the state.
The Republican margin in Caribou County reached its widest at seventy-three points in 2012. The margin in 2024 was seventy-one points, in line with the county's deep historical pattern.
Caribou County's loyalty is rooted in its place. Median household income of $68,782, a 92% non-Hispanic-white share, and a population of 7,162 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 Lincoln County and Oneida County.
