Kenosha County is located in the southeastern corner of the U.S. state of Wisconsin. The population was 169,151 as of the 2020 census, making it the eighth most populous county in Wisconsin.^[1][2] The county shares the same name as the city of Kenosha,^[3] the fourth largest city in Wisconsin.^[1] Kenosha County is part of the Chicago metropolitan area, the fourth most-populous metropolitan area in North America. Kenosha County is situated on the southwestern shore of Lake Michigan.

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Kenosha County
County
Kenosha County Courthouse and Jail
Location within the U.S. state of Wisconsin
Wisconsin's location within the U.S.
Coordinates: 42°34′22″N 87°50′23″W
Country	United States
State	Wisconsin
Founded	January 30, 1850
Seat	Kenosha
Largest city	Kenosha
Area
• Total	754 sq mi (1,950 km2)
• Land	272 sq mi (700 km2)
• Water	482 sq mi (1,250 km2)  64%
Population  (2020)
• Total	169,151
• Density	224.3/sq mi (86.6/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	1st
Website	www.kenoshacounty.org

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The county has a direct rail link to Chicago via Metra's Union Pacific / North Line. Since 2000, the county saw a population increase of 12.6%, higher than the overall Wisconsin growth of 6.0%.^[4] According to Business Insider, Kenosha County is an exurb and benefits as part of the Chicago metropolitan area.^[5] In 2022, Kenosha County was ranked 16th out of 72 Wisconsin counties for tourism revenue, at $424 million in 2022; a 13.6% increase over 2021. Kenosha County's previous record level was in 2019 at $391 million.^[6]

The Potowatomi inhabited the area that would become Kenosha County for centuries prior to the acquisition of the area in 1833. The city of Kenosha was founded in 1835, and Kenosha County was formed from Racine County on January 30, 1850.^[7] Its location led to development and factories being built in the 19th century. Manufacturing continued to be a key component of the economy into the 20th century.^[8]

According to the U.S. Census Bureau, the county has a total area of 754 square miles (1,950 km²), of which 272 square miles (700 km²) is land and 482 square miles (1,250 km²) (64%) is water.^[9] Although the county contains area from Lake Michigan, it is the fourth-smallest county in Wisconsin by land area.^[10]

As of the census^[16] of 2000, there were 149,577 people, 56,057 households, and 38,455 families residing in the county. The population density was 548 people per square mile (212 people/km²). There were 59,989 housing units at an average density of 220 units per square mile (85 units/km²). The racial makeup of the county was 88.38% White, 5.08% Black or African American, 0.38% Native American, 0.92% Asian, 0.04% Pacific Islander, 3.29% from other races, and 1.91% from two or more races. 7.19% of the population were Hispanic or Latino of any race. 28.8% were of German, 10.4% Italian, 7.9% Irish, 7.6% Polish and 7.5% English ancestry.

There were 56,057 households, out of which 34.80% had children under the age of 18 living with them, 52.70% were married couples living together, 11.50% had a female householder with no husband present, and 31.40% were non-families. 25.50% of all households were made up of individuals, and 9.10% had someone living alone who was 65 years of age or older. The average household size was 2.60 and the average family size was 3.13.

In the county, the population was spread out, with 27.10% under the age of 18, 9.40% from 18 to 24, 31.30% from 25 to 44, 20.70% from 45 to 64, and 11.50% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 98.30 males. For every 100 females age 18 and over, there were 95.30 males.

In 2017, there were 1,873 births, giving a general fertility rate of 55.7 births per 1000 women aged 15–44, the 13th lowest rate out of all 72 Wisconsin counties.^[17]

The county legislature is known as the Board of Supervisors. It consists of 23 members, each elected from single-member districts. The county executive is elected in a spring countywide, nonpartisan vote. The county executive is Samantha Kerkman.^[18] The district attorney, treasurer, clerk, and register of deeds are elected in fall countywide, partisan elections held in presidential years, while the sheriff and clerk of circuit court are elected in fall countywide, partisan elections held in gubernatorial years.

In presidential elections, Kenosha County has voted Democratic for most of the past century. In 2016, Donald Trump became the first Republican presidential candidate to win the county since President Nixon in 1972. Trump won it again in 2020, this time with an outright majority of the vote, marking the first consecutive victories for the GOP in Kenosha County since 1928.

• National Register of Historic Places listings in Kenosha County, Wisconsin