Rivers and streams

• Harker Creek

Major highways

Railroads

• Wisconsin and Southern Railroad

Buses

Iowa County is served by Lamers Connect which offers two buses a day, one traveling east to Madison and Milwaukee and one west to Dubuque via its Dodgeville stop.

• List of intercity bus stops in Wisconsin

Airport

• Iowa County Airport (KMRJ) serves the county and surrounding communities.

2020 census

As of the census of 2020,^[1] the population was 23,709. The population density was 31.1 people per square mile (12.0 people/km²). There were 10,905 housing units at an average density of 14.3 units per square mile (5.5 units/km²). The racial makeup of the county was 94.2% White, 0.8% Asian, 0.5% Black or African American, 0.2% Native American, 0.1% Pacific Islander, 0.9% from other races, and 3.5% from two or more races. Ethnically, the population was 1.9% Hispanic or Latino of any race.

2000 census

As of the census^[15] of 2000, there were 22,780 people, 8,764 households, and 6,213 families residing in the county. The population density was 30 people per square mile (12 people/km²). There were 9,579 housing units at an average density of 13 units per square mile (5.0 units/km²). The racial makeup of the county was 98.70% White, 0.17% Black or African American, 0.11% Native American, 0.34% Asian, 0.01% Pacific Islander, 0.11% from other races, and 0.55% from two or more races. 0.33% of the population were Hispanic or Latino of any race. 33.6% were of German, 17.2% Norwegian, 11.6% English, 11.3% Irish and 7.9% American ancestry.

There were 8,764 households, out of which 34.60% had children under the age of 18 living with them, 59.50% were married couples living together, 7.60% had a female householder with no husband present, and 29.10% were non-families. 24.30% of all households were made up of individuals, and 10.10% had someone living alone who was 65 years of age or older. The average household size was 2.56 and the average family size was 3.06.

In the county, the population was spread out, with 27.10% under the age of 18, 6.60% from 18 to 24, 30.40% from 25 to 44, 22.50% from 45 to 64, and 13.30% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 99.30 males. For every 100 females age 18 and over, there were 97.70 males.

Cities

• Dodgeville
• Mineral Point

Villages

Towns

Census-designated place

• Edmund

Unincorporated communities

Ghost towns

• Adamsville
• Dirty Hollow
• Minersville
• Pendarvis