Monday is the final day to register to vote in the July 17 primary runoffs.
A number of Republican primaries, including contests for attorney general and lieutenant governor, will be decided in the runoff.
U.S. Representative Martha Roby faces former congressman Bobby Bright in the GOP runoff for the 2nd congressional district.
Attorney General Steve Marshall faces former Attorney General Troy King in the GOP runoff for attorney general.
In the Republican primary for lieutenant governor, Alabama Public Service Commission President Twinkle Cavanaugh faces state Representative Will Ainsworth.
State Senator Gerald Dial of Lineville faces Rick Pate, a farmer and businessman, in the GOP runoff for agriculture commissioner.