Racine County is a county in southeastern Wisconsin. As of the 2020 census, its population was 197,727, making it Wisconsin's fifth-most populous county. Its county seat is Racine. The county was founded in 1836, then a part of the Wisconsin Territory. Racine County comprises the Racine metropolitan statistical area. This area is part of the Milwaukee-Racine-Waukesha combined statistical area. According to the U.S. Census Bureau, the county has an area of 792 square miles (2,050 km2), of which 333 square miles (860 km2) is land and 460 square miles (1,200 km2) (58%) is water. The county's unemployment rate was 5.6% in June 2021.

Racine is a city in and the county seat of Racine County, Wisconsin, United States. It is located on the shore of Lake Michigan at the mouth of the Root River. Racine is situated 22 miles (35 km) south of Milwaukee and approximately 60 miles (100 km) north of Chicago. It is the principal city of the US Census Bureau's Racine metropolitan area. The Racine metropolitan area is, in turn, counted as part of the Milwaukee combined statistical area. As of the 2020 U.S. Census, the city had a population of 77,816, making it the fifth-most populous city in Wisconsin. In January 2017, it was rated "the most affordable place to live in the world" by the Demographia International Housing Affordability survey.