Tuesday is Election Day in Johnson County. Here's where to vote and what's on the ballot.

Tuesday is Election Day and the last chance to vote in the midterm races for county, state and federal offices happening throughout Johnson County and in Iowa City.

Voters who go to the polls will determine their choices on the ballot for U.S. Senate, Johnson County Supervisor, Iowa House of Representatives and Iowa Senate. While voters decide who will represent them at these three levels of government after high turnover due to retirements and redistricting earlier this year, they will also choose whether to add an amendment to the Iowa Constitution concerning gun ownership.

The Press-Citizen staff will be out Tuesday covering the key races throughout the county. Look for results and stories on press-citizen.com.

Here's what you need to know before you head out to vote.

More:Before voting on Election Day, read the Press-Citizen's coverage on key Johnson County races

Where and when can I vote?

Polls will be open Tuesday from 7 a.m. to 8 p.m., but as long as you are in line before polls close, you will be able to vote.

Voters are assigned a voting precinct when they register to vote based on where they live. To find your voting precinct, look at the Johnson County Auditor's interactive map, or go to the Iowa Secretary of State's website to look up voter registration details.

If a voter is not registered to vote on Election Day, they can still register at their polling place. You can check voter registration at the Iowa Secretary of State's website.

Voters who requested and still have their mailed absentee ballots must make sure it arrives at the Johnson County Auditor's Office before the polls close at 8 p.m. to ensure it is counted.

What should I bring with me to vote?

Voters need to bring a photo ID to 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 will need to sign an oath. Falsely attesting or being attested for is a felony punishable by up to five years in prison.

If you are registering to vote at the polls, you will need to go to the correct polling place for your current address. At the polling place, you must prove both who you are and where you live, according to the Iowa Secretary of State's website.

Voters can wear campaign buttons and clothing, but they must leave the polling place as soon as they are done voting. Campaigning or electioneering of any kind in a polling place is illegal; loitering in a polling place while wearing political items is considered electioneering, according to the Iowa Secretary of State's website.

What is on the ballot this year?

This year, Iowa City and Johnson County voters will choose who represents them at the county, state and federal levels of government while also voting on one ballot question and judicial retention elections.

At the federal level, voters will pick who they wish to represent them in U.S. Senate and Iowa's 1st Congressional District in the U.S. House of Representatives. At the statewide level, voters will choose who becomes governor, treasurer, auditor, attorney general and secretary of state.

All nine Johnson County seats in the Iowa Legislature are on the ballot and six are contested between Republican, Democratic and one Libertarian candidate. State Rep. Dave Jacob and state Sen. Zach Wahls in Coralville, and Democrat Adam Zabner in northern Iowa City are running uncontested.

Voters can write-in candidates for any races in Johnson County in the space provided on the ballot.

During the past several months, reporters at the Press-Citizen have been writing about contested elections across Johnson County. Reporters covered debates, wrote profiles and explored issues surrounding these important races.

All of that coverage is available both online and in print to help give you the information you need before voting.

More information on voting in Iowa is also available at voterready.iowa.gov.

George Shillcock is the Press-Citizen's local government and development reporter covering Iowa City and Johnson County. He can be reached at (319) 214-5039, GShillcock@press-citizen.com and on Twitter @ShillcockGeorge

This article originally appeared on Iowa City Press-Citizen: Election Day in Iowa City is today. Here's what to know before voting