OVERLAND PARK, Kan. -- Voter turnout in the state of Kansas is expected to be record-breaking. According to the Kansas Secretary of State's Office, more than 650,000 ballots have already been cast. Your Local Election Headquarters: Candidates, races and results on FOX4 In most of Kansas, polls are open from 7 a.m. to 7 p.m., except for Johnson County. In Johnson County, the polls open an hour earlier at 6 a.m. If you received a ballot through the mail, you can return it to a polling place near you or the election office. Here's what you need in order to vote: You will need a valid photo ID, a non-expired driver's license, a military ID, a United States passport, a driver's license from any state, a native American ID card, a student ID, a concealed carry license, a government employee badge or a public assistance ID. Read more Politics stories from FOX4 Let's take a look at several of the races Kansas voters will decide: Democrat Sharice Davids is an incumbent in the Kansas third district. She is an attorney and former mixed martial artist. Her opponent is Republican Prasanth Reddy. Dr. Reddy lives in Lenexa and earned his medical degree from the University of Kansas Medical Center. In the second district, former Republican Kansas Attorney General Derek Schmidt is running against Democrat Nancy Boyda. Schmidt previously served as a Kansas state senator. Boyda is a chemist and served as the second district congresswoman from 2007 to 2009. Johnson County, Kansas, voters will elect a new sheriff. Republican Doug Bedford and Democrat Byron Roberson are squaring off to replace Sheriff Calvin Hayden. Read more Politics stories from FOX4 Bedford was a former undersheriff for the county. Roberson is the Prairie Village Police Chief right now. Johnson County District Attorney Steve Howe is running for reelection to be the county's top prosecutor. He was first elected to that position in 2008 and has been a prosecutor for more than 33 years. He faces Democrat Vanessa Riebli. She's practiced criminal law in Johnson County for more than 25 years and was an assistant district attorney for 21 of those years.