Missouri's 23rd Senatorial District is one of 34 districts in the Missouri Senate. The district has been represented by Republican Adam Schnelting since 2025.
The district is based in eastern St. Charles county within the northern side of the St. Louis metropolitan area, and is situated between the Missouri and Mississippi rivers. Major municipalities in the district include St. Charles and St. Peters. The district is also home to Lindenwood University and several conservation areas for nature and wildlife.
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