The story
History
Dane County was formed in 1836 as a territorial county and organized in 1839. It was named after Nathan Dane, a Massachusetts delegate to the Congress of the Confederation who helped carve Wisconsin out of the Northwest Territory. Dane County was settled in the 1840s by settlers from New England.
2020 census
As of the 2020 census, the county had a population of 561,504. The population density was 469.3 inhabitants per square mile (181.2/km2). There were 248,795 housing units at an average density of 207.9 units per square mile (80.3 units/km2).
There were 238,417 households in the county, of which 25.7% had children under the age of 18 living in them. Of all households, 43.2% were married-couple households, 21.7% were households with a male householder and no spouse or partner present, and 26.7% were households with a female householder and no spouse or partner present. About 32.5% of all households were made up of individuals and 9.7% had someone living alone who was 65 years of age or older.
The median age was 35.7 years. 20.1% of residents were under the age of 18 and 14.7% of residents were 65 years of age or older. For every 100 females there were 98.5 males, and for every 100 females age 18 and over there were 96.9 males age 18 and over.
The racial makeup of the county was 77.6% White, 5.4% Black or African American, 0.4% American Indian and Alaska Native, 6.4% Asian, <0.1% Native Hawaiian and Pacific Islander, 3.2% from some other race, and 6.9% from two or more races. Hispanic or Latino residents of any race comprised 7.5% of the population.
86.4% of residents lived in urban areas, while 13.6% lived in rural areas. Among the 248,795 housing units, 4.2% were vacant. Among occupied housing units, 56.3% were owner-occupied and 43.7% were renter-occupied. The homeowner vacancy rate was 0.8% and the rental vacancy rate was 3.9%.
2010 census
At the 2010 census there were 488,073 people, 203,750 households, and 116,752 families living in the county. The population density was 394 people per square mile (152 people/km2). There were 216,022 housing units at an average density of 174 units per square mile (67 units/km2). The racial makeup of the county was 84.7% White, 5.2% Black or African American, 0.4% Native American, 4.7% Asian, 0.03% Pacific Islander, 2.5% from other races, and 2.5% from two or more races. 5.9% of the population were Hispanic or Latino of any race.
Of the 203,750 households 27.0% had children under the age of 18 living with them, 45.1% were married couples living together, 8.6% had a female householder with no husband present, and 42.7% were non-families. 30.5% of households were one person and 7.7% were one person aged 65 or older. The average household size was 2.33 and the average family size was 2.95.
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The age distribution was 21.7% under the age of 18, 12.8% from 18 to 24, 29.5% from 25 to 44, 25.7% from 45 to 64, and 10.3% 65 or older. The median age was 34.4 years. For every 100 females, there were 97.80 males. For every 100 females age 18 and over, there were 96.00 males.
2000 census
At the 2000 census there were 426,526 people, 173,484 households, and 100,794 families living in the county. The population density was 355 people per square mile (137 people/km2). There were 180,398 housing units at an average density of 150 units per square mile (58 units/km2). The racial makeup of the county was 88.96% White, 4.00% Black or African American, 0.33% Native American, 3.45% Asian, 0.03% Pacific Islander, 1.43% from other races, and 1.79% from two or more races. 3.37% of the population were Hispanic or Latino of any race. 34.4% were of German, 11.5% Norwegian, 8.9% Irish and 6.0% English ancestry.
Of the 173,484 households 29.00% had children under the age of 18 living with them, 47.10% were married couples living together, 7.90% had a female householder with no husband present, and 41.90% were non-families. 29.40% of households were one person and 7.00% were one person aged 65 or older. The average household size was 2.37 and the average family size was 2.97.
The age distribution was 22.60% under the age of 18, 14.30% from 18 to 24, 32.50% from 25 to 44, 21.30% from 45 to 64, and 9.30% 65 or older. The median age was 33 years. For every 100 females, there were 97.90 males. For every 100 females age 18 and over, there were 96.00 males.
From Wikipedia’s article on Dane County, Wisconsin, shared under CC BY-SA 4.0.4