Warren County is a county located in the eastern portion of the U.S. state of Missouri. As of the 2020 census, the population was 35,532. The county is located on the north side of the Missouri River. Its county seat is Warrenton. The county was established on January 5, 1833, and was named for General Joseph Warren, who died in the Battle of Bunker Hill during the American Revolutionary War. Warren County is part of the St. Louis, MO-IL Metropolitan Statistical Area. The county is traversed by Route 94, called the "Missouri Weinstrasse" because of the many vineyards from Marthasville east into St. Charles County. Warren County is also part of the Missouri Rhineland, with award-winning wineries located on both sides of the Missouri River.

Founded: January 5, 1833
Named for: General Joseph Warren
Seat: Warrenton
Largest city: Warrenton
Total: 438 sq mi (1,134.41 km²)
Land: 429 sq mi (1,111.1 km²)
Water: 9.2 sq mi (23.83 km²), 2.1
Time zone: Central: UTC-6-5
Website: [www.warrencountymo.org]
Official Website: http://www.warrencountymo.org
Wikidata description: county in Missouri, United States
Wikidata id: Q497634
Wikidata label: Warren County
Wikidata aliases: Array
Source
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