- Democratic congressional and state primaries: open
- Republican congressional and state primaries: mixed
- Democratic Presidential primary: open
- Republican Presidential primary: closed
- Optional party affiliation. Voters are given the option to affiliate or not to affiliate with a political party on the registration form.
- 57% of Alaska voters are registered unaffiliated, undeclared or independent.
Details of state and local primary elections:
- The Republican Party allows registered Republicans, nonpartisan, and undeclared voters to participate in their primary.
- The Alaskan Democratic Party, the Alaskan Independence Party, and the Alaska Libertarian Party allow any registered voter to participate in their primary.