| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 64,778 | 62,920 | 133,945 | |
| 2020 | D | 71,316 | 69,685 | 146,191 | |
| 2016 | R | 54,036 | 60,987 | 130,021 | |
| 2012 | R | 54,044 | 66,387 | 125,171 | |
| 2008 | R | 55,283 | 76,758 | 135,081 | |
| 2004 | R | 41,608 | 67,755 | 112,525 | |
| 2000 | R | 34,707 | 67,941 | 118,881 | |
| 1996 | R | 32,645 | 51,626 | 97,814 | |
| 1992 | R | 32,856 | 45,230 | 109,355 | |
| 1988 | R | 29,427 | 50,509 | 82,577 | |
| 1984 | R | 25,170 | 60,984 | 88,769 | |
| 1980 | R | 15,186 | 38,956 | 65,916 | |
| 1976 | R | 17,136 | 31,884 | 51,877 | |
| 1972 | R | 10,944 | 23,968 | 37,853 | |
| 1968 | R | 13,005 | 13,833 | 30,669 | |
| 1964 | D | 13,537 | 9,051 | 22,588 | |
| 1960 | R | 9,581 | 11,119 | 20,700 | |
| 1956 | — | — | — | — | |
| 1952 | — | — | — | — | |
| 1948 | — | — | — | — | |
| 1944 | — | — | — | — | |
| 1940 | — | — | — | — | |
| 1936 | — | — | — | — | |
| 1932 | — | — | — | — | |
| 1928 | — | — | — | — | |
| 1924 | — | — | — | — | |
| 1920 | — | — | — | — | |
| 1916 | — | — | — | — | |
| 1912 | — | — | — | — | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Anchorage holds nearly a third of Alaska's total population, making it the state's dominant electoral weight. Its mix of federal workers, military households, and a growing Alaska Native population keeps presidential margins razor-thin.
The county's recent history is a story of close margins. The Democratic margin reached twenty points in 1964; the Republican margin reached forty points in 1984. Most other elections have been decided by single-digit points.
Anchorage Municipality's demographics — a population of 288,976, a 57% non-Hispanic-white share, a median household income of $103,284 — situate the county close to national averages on several dimensions. The county's voting pattern over the last decade is most similar to that of Oklahoma County and Collin County.