Missouri's 20th Senatorial District is one of 34 districts in the Missouri Senate. The district has been represented by Republican Curtis Trent since 2023.
The district is based in southwestern Missouri and includes Barton, Dade, and Webster counties, and part of Greene county (the excluded portion is primarily Springfield city limits, which is District 30). Major municipalities in the district include Battlefield, Lamar, Marshfield, Republic, and Willard. The district is also home to the Harry S. Truman Birthplace State Historic Site and a portion of Stockton Lake.
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