| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 20,754 | 29,480 | 50,847 | |
| 2020 | R | 23,383 | 27,657 | 51,930 | |
| 2016 | R | 16,459 | 20,577 | 40,294 | |
| 2012 | R | 16,945 | 19,884 | 37,465 | |
| 2008 | R | 15,579 | 19,761 | 35,800 | |
| 2004 | R | 14,815 | 17,277 | 32,404 | |
| 2000 | R | 11,794 | 12,386 | 25,147 | |
| 1996 | D | 12,912 | 9,262 | 24,938 | |
| 1992 | D | 10,882 | 7,994 | 24,638 | |
| 1988 | R | 9,023 | 10,393 | 19,677 | |
| 1984 | R | 8,017 | 11,379 | 19,578 | |
| 1980 | R | 5,110 | 10,790 | 16,882 | |
| 1976 | D | 7,323 | 6,796 | 14,560 | |
| 1972 | R | 4,003 | 6,999 | 11,572 | |
| 1968 | R | 2,930 | 4,596 | 9,012 | |
| 1964 | R | 4,770 | 4,870 | 9,649 | |
| 1960 | R | 3,052 | 4,090 | 7,151 | |
| 1956 | R | 2,033 | 3,928 | 5,970 | |
| 1952 | R | 2,593 | 3,478 | 6,071 | |
| 1948 | D | 2,669 | 1,841 | 4,566 | |
| 1944 | D | 2,660 | 1,579 | 4,252 | |
| 1940 | D | 3,052 | 1,533 | 4,597 | |
| 1936 | D | 3,037 | 1,052 | 4,142 | |
| 1932 | D | 2,602 | 1,248 | 4,146 | |
| 1928 | R | 1,316 | 1,608 | 2,924 | |
| 1924 | R | 684 | 1,060 | 2,471 | |
| 1920 | R | 1,031 | 1,078 | 2,109 | |
| 1916 | D | 1,240 | 574 | 1,881 | |
| 1912 | D | 287 | 168 | 735 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Navajo County spans nearly 10,000 square miles of plateau and canyon country, with the Navajo and Hopi nations covering much of its interior. That reservation geography drives turnout patterns and ballot-access logistics unlike almost any other Arizona county.
The Republican margin in Navajo County reached its widest at thirty-four points in 1980. The margin in 2024 was seventeen points, in line with the county's deep historical pattern.
Navajo County's loyalty is rooted in its place. Median household income of $54,606, a 45% non-Hispanic-white share, and a population of 108,415 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 Wilkes County and Natchitoches Parish.