| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 22,113 | 72,059 | 96,340 | |
| 2020 | R | 24,312 | 62,837 | 89,467 | |
| 2016 | R | 16,264 | 44,449 | 66,286 | |
| 2012 | R | 18,851 | 39,381 | 59,828 | |
| 2008 | R | 22,120 | 38,387 | 61,932 | |
| 2004 | R | 17,584 | 36,173 | 54,603 | |
| 2000 | R | 13,488 | 28,162 | 43,812 | |
| 1996 | R | 13,627 | 18,740 | 39,186 | |
| 1992 | R | 11,553 | 13,065 | 36,328 | |
| 1988 | R | 11,621 | 15,093 | 27,130 | |
| 1984 | R | 9,004 | 17,330 | 26,689 | |
| 1980 | R | 7,521 | 17,022 | 26,912 | |
| 1976 | R | 7,225 | 10,493 | 18,159 | |
| 1972 | R | 5,162 | 9,958 | 16,238 | |
| 1968 | R | 6,207 | 7,092 | 14,771 | |
| 1964 | D | 8,215 | 6,096 | 14,311 | |
| 1960 | D | 7,744 | 6,704 | 14,448 | |
| 1956 | R | 6,149 | 7,330 | 13,479 | |
| 1952 | R | 5,414 | 7,272 | 12,774 | |
| 1948 | D | 5,284 | 4,265 | 10,262 | |
| 1944 | D | 5,792 | 4,388 | 10,222 | |
| 1940 | D | 5,997 | 4,333 | 10,462 | |
| 1936 | D | 5,752 | 2,586 | 8,999 | |
| 1932 | D | 4,743 | 2,813 | 8,262 | |
| 1928 | R | 2,020 | 4,973 | 7,114 | |
| 1924 | R | 790 | 3,289 | 7,335 | |
| 1920 | R | 1,818 | 3,518 | 5,336 | |
| 1916 | D | 2,855 | 2,741 | 6,422 | |
| 1912 | D | 2,506 | 1,690 | 7,200 | |
| 1908 | R | 2,206 | 4,407 | 8,010 | |
| 1904 | R | 1,178 | 4,165 | 6,166 | |
| 1900 | D | 1,871 | 1,472 | 3,417 | |
| 1896 | D | 1,432 | 334 | 1,779 | |
| 1892 | R | 0 | 713 | 1,487 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Anchored by Coeur d'Alene on the shores of its namesake lake, Kootenai has drawn steady in-migration from the Pacific Northwest, yet its presidential margins have widened each cycle, reaching R+51.8 in 2024.
The Republican margin in Kootenai County reached its widest at fifty-two points in 2024. The margin in 2024 was fifty-two points, in line with the county's deep historical pattern.
Kootenai County's loyalty is rooted in its place. Median household income of $81,861, a 87% non-Hispanic-white share, and a population of 181,996 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 Washington County and Stillwater County.
