Missouri's 31st Senatorial District is one of 34 districts in the Missouri Senate. The district has been represented by Republican Rick Brattin since 2021.
The district is based in west-central Missouri and includes all of Bates, Cass, and Johnson counties. Major municipalities in the district include Belton, Harrisonville, Raymore, and Warrensburg. The district is also home to Knob Noster State Park, Powell Gardens, and the University of Central Missouri.
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