According to the U.S. Census Bureau, the county has a total area of 577 square miles (1,490 km2), of which 555 square miles (1,440 km2) is land and 21 square miles (54 km2) (3.7%) is water.[6]
U.S. Decennial Census[7] 1790–1960[8] 1900–1990[9] 1990–2000[10] 2010[11] 2020[2]
Walworth County, Wisconsin – Racial and ethnic composition Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.
As of the census of 2020,[2] the population was 106,478. The population density was 191.7 people per square mile (74.0 people/km2). There were 53,146 housing units at an average density of 95.7 units per square mile (36.9 units/km2). The racial makeup of the county was 85.4% White, 1.1% Black or African American, 1.0% Asian, 0.4% Native American, 4.6% from other races, and 7.4% from two or more races. Ethnically, the population was 11.8% Hispanic or Latino of any race.
2000 Census Age Pyramid for Walworth County
2000 census
At the 2000 census there were 93,759 people, 34,522 households, and 23,267 families in the county. The population density was 169 people per square mile (65 people/km2). There were 43,783 housing units at an average density of 79 units per square mile (31 units/km2). The racial makeup of the county was 94.49% White, 0.84% Black or African American, 0.23% Native American, 0.65% Asian, 0.03% Pacific Islander, 2.62% from other races, and 1.14% from two or more races. 6.54% of the population were Hispanic or Latino of any race.[16]
Of the 34,522 households 31.80% had children under the age of 18 living with them, 55.40% were married couples living together, 8.20% had a female householder with no husband present, and 32.60% were non-families. 24.70% of households were one person and 9.20% were one person aged 65 or older. The average household size was 2.57 and the average family size was 3.07.
The age distribution was 24.20% under the age of 18, 13.80% from 18 to 24, 27.60% from 25 to 44, 21.80% from 45 to 64, and 12.70% 65 or older. The median age was 35 years. For every 100 females there were 98.90 males. For every 100 females age 18 and over, there were 97.20 males.
In 2017, there were 918 births, giving a general fertility rate of 48.8 births per 1000 women aged 15–44, the sixth lowest rate out of all 72 Wisconsin counties.[17]
Owing to its Yankee heritage,[19] which contrasts with the German-American or Scandinavian-American character of most of Wisconsin, Walworth County was initially a stronghold of the Free Soil Party.[20] It voted for Martin van Buren and John P. Hale in Wisconsin's first two presidential elections,[21] and its opposition to the spread of slavery led to its population voting Republican in subsequent elections,[21] even resisting the appeal of Wisconsin native Robert La Follette when he carried the state in 1924 as a Progressive.[22]
Walworth County remains strongly Republican.[22][23] The only Democrat to carry the county was Woodrow Wilson in 1912, who won 36 percent of the vote. Even with the GOP mortally divided between President William Howard Taft and Theodore Roosevelt, Wilson only won the county by 29 votes. The best Democratic showings since then have been by Lyndon Johnson in 1964 and Barack Obama in 2008, both of whom received around 48 percent. Franklin D. Roosevelt and Bill Clinton are the only other Democrats since Wilson to cross the 40 percent mark, though Joe Biden came very close in 2020.
