St. Louis County is located in eastern Missouri. It is bounded by the City of St. Louis and the Mississippi River to the east, the Missouri River to the north, and the Meramec River to the south. As o
Clayton, the St. Louis County seat
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The Old Courthouse was built in downtown St. Louis from 1839 to 1856 as the second purpose-built county courthouse for St. Louis County.
Local politician David H. Armstrong was a strong supporter of the separation of the city of St. Louis from St. Louis County.