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St. Louis County
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St. Louis County is located in the eastern-central portion of 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. At the 2020 census, the total population was 1,004,125, [1] making it the most populous county in Missouri.
St. Louis County has 88 municipalities and 10 unincorporated census-designated places:
Find official information and services from St. Louis County, Missouri, such as tax payments, property declarations, and more.
St. Louis County, Missouri has 508.0 square miles of land area and is the 77th largest county in Missouri by total area. Topics in the St. Louis County, Missouri data profile include: Populations and People; Income and Poverty; Education; Employment; Housing; Health; Business and Economy; Families and Living Arrangements; Race and Ethnicity.
Jul 17, 2024 · Discover St. Louis County, MO’s population & how it has changed over time. USAFacts uses Census data to break down the population of St. Louis County by race, age,and more. View today.
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The 5th Missouri Senate district is entirely within the city, while the 4th is shared with St. Louis County. At the federal level, St. Louis is the heart of Missouri's 1st congressional district, which also includes part of northern St. Louis County.