The estimate released Tuesday is a compilation of turnout estimates submitted to the secretary of state’s office by the 116 election authorities around the state.
If the 51 percent prediction is met, more than 2.1 million votes will be cast on Nov. 2 in Missouri.
In the 2006 mid-term elections, 53.1 percent of registered voters turned out on election day, compared to 51 percent in 2002, and 43.4 percent in 1998.
The secretary of state’s office also released the statewide voter registration total. There are 4,137,545 residents registered to vote, which includes more than 105,000 first-time voters and more than 600,000 who updated their name or address for the elections.
Polling places will be open from 6 a.m. to 7 p.m. on Tuesday.
Absentee voting across Missouri is already underway.
The voter registration deadline has already passed, closing on Oct. 6.
To find out more information about the location of polling places around the state, view a sample ballot, and learn what type of identification to bring, visit the secretary of state’s voting rights center website.