| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 214 | 1,211 | 1,447 | |
| 2020 | R | 180 | 1,157 | 1,369 | |
| 2016 | R | 104 | 797 | 1,118 | |
| 2012 | R | 83 | 915 | 1,015 | |
| 2008 | R | 154 | 831 | 1,006 | |
| 2004 | R | 109 | 922 | 1,037 | |
| 2000 | R | 152 | 736 | 903 | |
| 1996 | R | 179 | 523 | 796 | |
| 1992 | R | 154 | 525 | 876 | |
| 1988 | R | 234 | 621 | 860 | |
| 1984 | R | 131 | 797 | 931 | |
| 1980 | R | 143 | 762 | 939 | |
| 1976 | R | 248 | 541 | 806 | |
| 1972 | R | 120 | 604 | 759 | |
| 1968 | R | 183 | 525 | 747 | |
| 1964 | R | 326 | 435 | 761 | |
| 1960 | R | 291 | 511 | 802 | |
| 1956 | R | 253 | 561 | 814 | |
| 1952 | R | 251 | 569 | 820 | |
| 1948 | R | 366 | 399 | 766 | |
| 1944 | D | 395 | 394 | 789 | |
| 1940 | D | 475 | 447 | 922 | |
| 1936 | D | 488 | 388 | 880 | |
| 1932 | D | 469 | 398 | 867 | |
| 1928 | R | 224 | 470 | 694 | |
| 1924 | R | 211 | 403 | 645 | |
| 1920 | R | 222 | 449 | 671 | |
| 1916 | D | 454 | 325 | 779 | |
| 1912 | R | 238 | 329 | 673 | |
| 1908 | R | 285 | 425 | 715 | |
| 1904 | R | 240 | 439 | 679 | |
| 1900 | R | 282 | 387 | 670 | |
| 1896 | D | 408 | 162 | 570 | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Rich County, anchored by the small ranching and resort community of Randolph, recorded an R+68.6 margin in 2024 despite a population under 2,000, reflecting the deep Republican lean common to rural intermountain cattle country.
The Republican margin in Rich County reached its widest at eighty-two points in 2012. The margin in 2024 was sixty-nine points, in line with the county's deep historical pattern.
Rich County's loyalty is rooted in its place. Median household income of $79,009, a 92% non-Hispanic-white share, and a population of 2,631 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 Franklin County and Cassia County.
