| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 385 | 1,753 | 2,189 | |
| 2020 | R | 416 | 1,936 | 2,382 | |
| 2016 | R | 318 | 1,723 | 2,171 | |
| 2012 | R | 471 | 1,688 | 2,228 | |
| 2008 | R | 638 | 1,423 | 2,123 | |
| 2004 | R | 456 | 1,677 | 2,170 | |
| 2000 | R | 423 | 1,727 | 2,228 | |
| 1996 | R | 705 | 1,392 | 2,511 | |
| 1992 | R | 634 | 1,026 | 2,625 | |
| 1988 | R | 905 | 1,462 | 2,426 | |
| 1984 | R | 787 | 1,934 | 2,749 | |
| 1980 | R | 745 | 1,723 | 2,653 | |
| 1976 | R | 1,117 | 1,347 | 2,486 | |
| 1972 | R | 828 | 1,659 | 2,557 | |
| 1968 | R | 1,100 | 1,353 | 2,632 | |
| 1964 | D | 1,612 | 1,242 | 2,857 | |
| 1960 | R | 1,455 | 1,457 | 2,925 | |
| 1956 | R | 1,427 | 1,605 | 3,032 | |
| 1952 | R | 1,224 | 1,771 | 3,017 | |
| 1948 | D | 1,506 | 964 | 2,569 | |
| 1944 | D | 1,435 | 1,089 | 2,543 | |
| 1940 | D | 2,225 | 1,110 | 3,366 | |
| 1936 | D | 2,555 | 850 | 3,494 | |
| 1932 | D | 2,054 | 1,127 | 3,324 | |
| 1928 | R | 1,135 | 1,671 | 2,828 | |
| 1924 | R | 473 | 1,236 | 2,647 | |
| 1920 | R | 648 | 1,693 | 2,522 | |
| 1916 | D | 1,252 | 999 | 2,355 | |
| 1912 | — | — | — | — | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Phillips County's vast Hi-Line rangelands and a population under 5,000 produce some of the most consistent Republican margins in the state, with the 2024 presidential race decided by more than 62 points.
The Democratic margin in Phillips County peaked at forty-nine points in 1936. By 1968 the county had flipped, voting Republican for the first time in many years. The 2024 margin was sixty-two points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Phillips County's median household income of $53,417 sits well below state and national norms, and 11% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country. The county's voting pattern over the last decade is most similar to that of Lincoln County and Judith Basin County.