Missouri's 16th Senatorial District is one of 34 districts in the Missouri Senate. The district has been represented by Republican Justin Brown since 2019. Geography. The district is based in south-central Missouri and includes Dent, Laclede, Maries, Phelps, Pulaski and Wright counties. Major municipalities in the district include Lebanon, Rolla, St. Robert, Waynesville, and the U.S. Army installation Fort Leonard Wood. The district is also home to Missouri University of Science and Technology. Statewide election results. Source: