There are 145 precincts in Ada County and more than 800 across the state are preparing for Tuesday's primary elections.
More than 7,000 Ada County residents have already cast their votes by voting early at the election office or mailing in absentee ballots.
If you received a ballot in the mail you must drop it off to the Ada County Elections Office by 8 p.m. Tuesday or your votes to be counted.
This year the Republican primary is closed, so only registered Republicans can vote for Republican candidates.
If you are not already a registered voter you register at your precinct Tuesday if you are 18 or over, a U.S. citizen, and have lived at your current address for at least 30 days. You will need a photo ID and proof of address.
To receive a ballot you must bring a government-issed photo ID, such as a driver's license or passport.
Election officials recommend researching candidates before you head out to the polls.
Precincts are open from eight to eight on Tuesday. To find your polling location Click Here.