Monroe County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 34,962. Its county seat and largest city is Waterloo.Monroe County is included in the St. Louis, MO-IL Metropolitan Statistical Area. It is located in the southern portion of Illinois known historically as "Little Egypt".
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Wikipedia https://en.wikipedia.org/wiki/Monroe_County,_Illinois
Coordinates 38°20'9.188" N -90°8'59.403" E
