Here's how to vote on Election Day in Iowa's primary for U.S. Senate, Congress, state Legislature

Tuesday is Iowans' final chance to cast their ballots in the state's primary election, which will decide the Democratic and Republican candidates in contested races for the U.S. Senate, Congress and the Iowa Legislature.

The nominees selected Tuesday for each of the major political parties will face off in the November general election.

U.S. Sen. Chuck Grassley, who is seeking an eighth term in office, is facing a primary challenge from state Sen. Jim Carlin, R-Sioux City. Meanwhile, three Democrats — former U.S. Rep. Abby Finkenauer, retired Navy Admiral Mike Franken and Minden City Council member Glenn Hurst — are vying for their party's nomination.

More: Who's running in Iowa's June 7 primary election? Here's what voters need to know

In the 3rd Congressional District, three Republicans are seeking the nomination to challenge Democratic U.S. Rep. Cindy Axne, who faces a competitive reelection battle in a district former President Donald Trump carried in 2020.

More: Iowa election results from Tuesday primaries

There are competitive local races on the ballot as well. Polk County Democratic candidates for county attorney and county treasurer, and voters around the state will pick their nominees for a host of contested Iowa House and Senate primaries.

Here's what to know if you're voting on election day in Iowa's primary.

When are the polls open?

Polls will open at 7 a.m. and close at 8 p.m. on election day statewide. As long as you are in line by 8 p.m., you will be able to vote.

The 8 p.m. poll close time is a difference from Iowa's last federal election in 2020. Polls previously closed at 9 p.m. in Iowa, but a Republican-backed law change last year requires polls to close at 8.

Where do I vote? Here's how you can find your polling place

Iowans can look up their polling place on the Iowa Secretary of State's voter information website, voterready.iowa.gov. Click where it says "Find Your Polling Place" and enter your ZIP code and address.

Voters can also contact their county auditors, who can help them find the proper location.

A list of Polk County precincts and their respective polling places is available here.

Iowans are voting in new districts for Congress and the Iowa House and Senate

Iowa's congressional and legislative district boundaries have changed as a result of last year's redistricting process, which takes place once a decade to account for changes in population.

This is the first election where the new lines will be used to select members of Congress and state lawmakers in the Iowa House and Senate.

All four of Iowa's Congressional seats are on the ballot this year, as are 34 Iowa Senate seats and all 100 Iowa House seats.

More: Iowans will vote in new congressional, legislative districts this year. Here's how to find yours.

A map created by Iowa's nonpartisan Legislative Services Agency allows Iowans to enter their address and see which Congressional district, which Iowa House district and which Iowa Senate district they live in under the new lines.

You should bring an ID with you — and proof of residency if you've recently moved

Registered Iowa voters must bring ID with them when they go to vote at the polls. Acceptable forms of identification are an Iowa driver's license or a non-operator ID, a U.S. passport or military ID, a veteran's ID, tribal ID or an Iowa voter ID card.

In some instances, you may need to prove your residency as well. Bring proof of residency if you are either voting in Iowa for the first time or if you've recently moved within the same county and have not updated your address with the auditor. If you have moved to a different county between elections, you will need to complete the election day registration day process at your precinct.

If someone can't prove their identity with any of those documents, a registered voter in their precinct can attest to who they are. Both the voter and the attester will need to sign an oath. Falsely attesting or being attested for is a felony punishable by up to five years in prison.

Check if you're registered to vote, or take advantage of same-day voter registration

The Iowa Secretary of State's website, sos.iowa.gov, has an online tool that allows Iowans to check if they're registered to vote. Just enter your name and ZIP code.

Iowa has same-day voter registration, meaning Iowans who are not registered to vote can do so at their polling place when they show up in person to vote. They will need to provide ID and proof of residency to register.

To vote in the Democratic or Republican primary, Iowans must register as a member of that political party.

What if I requested an absentee ballot but haven't returned it yet?

If you requested an absentee ballot, sometimes referred to as a mail ballot, and haven't sent it back yet, don't put it in the mail.

Instead, hand-deliver your completed mail ballot to your county auditor's office before the polls close at 8 p.m. Tuesday. Ballots must arrive at the auditor's office by the time polls close in order to be counted.

If you requested a mail ballot, but change your mind and decide to vote in person, bring your blank ballot with you so poll workers can cancel it and allow you to vote in person.

It's a felony to intimidate, threaten or coerce a voter

Voters in Iowa have the right to cast their ballot without being interrupted or hindered, and Iowa law has penalties for interfering in the voting process.

Someone commits first-degree election misconduct when they intimidate, threaten or coerce a voter — or attempt to do so — in order to pressure the voter into registering to vote or voting, or to keep them from registering or voting.

First-degree election misconduct is a felony punishable by up to five years in prison.

Someone commits third-degree election misconduct by loitering, congregating, electioneering, posting signs or soliciting votes within 300 feet of a polling place, or by interrupting, hindering or opposing a voter approaching a polling place. Submitting a false statement about whether someone is eligible to cast a ballot, interfering with a voter casting their vote, marking a ballot for the purpose of identifying it or trying to induce a voter to show how they have marked their ballot are also grounds for the charge.

Third-degree election misconduct is a serious misdemeanor punishable by up to a year in jail.

Most Iowans with past felony convictions can vote if they've served their sentence

People with past felony convictions can vote in Iowa if their voting rights have been restored by the governor.

Gov. Kim Reynolds signed an executive order in 2020 restoring voting rights to most people with felony convictions once they have completed their sentences, including any parole and probation.

The order does not apply to anyone convicted of homicide offenses, like murder or attempted murder, or some serious sexual abuse crimes. Those people may still apply directly to the governor's office to have their rights restored.

Stephen Gruber-Miller covers the Iowa Statehouse and politics for the Register. He can be reached by email at sgrubermil@registermedia.com or by phone at 515-284-8169. Follow him on Twitter at @sgrubermiller.

This article originally appeared on Des Moines Register: What to know about voting on election day in Iowa's June 7 primary