Grundy County, Iowa

Grundy County is a county located in the U.S. state of Iowa. At the 2020 census, the population was 12,329, and was estimated to be 12,361 in 2025. The county is named for Felix Grundy, former U.S. Attorney General.

Grundy County is included in the Waterloo–Cedar Falls metropolitan area.

History

Grundy County was formed on January 15, 1851, and became self-governing in 1856. It was named after Felix Grundy, a U.S. Senator and Representative from Tennessee and a former U.S. Attorney General under President Martin Van Buren.

The first courthouse was built in 1861. The wooden, two-story building contained a courtroom, but was used for other purposes, including housing the office of the sheriff, county treasurer, the judge, as well as a chamber for the jury. The cornerstone for a second courthouse was laid on November 11, 1891.

Geography

According to the United States Census Bureau, the county has a total area of , of which is land and (0.01%) is water. It is the 71st largest county in Iowa by total area.

Major highways

x20px U.S. Highway 20
x20px Iowa Highway 14
x20px Iowa Highway 57
x20px Iowa Highway 175

Adjacent counties

Butler County (north)
Black Hawk County (east)
Tama County (southeast)
Marshall County (southwest)
Hardin County (west)
Franklin County (northwest)

Demographics

thumb|right|Population of Grundy County from US census data

2020 census

thumb|left|2022 US Census [[population pyramid for Grundy County from ACS 5-year estimates]]

As of the 2020 census, the county had a population of 12,329 and a population density of . 96.97% of the population reported being of one race.

The racial makeup of the county was 96.0% White, 0.4% Black or African American, 0.1% American Indian and Alaska Native, 0.2% Asian, <0.1% Native Hawaiian and Pacific Islander, 0.3% from some other race, and 3.0% from two or more races. Hispanic or Latino residents of any race comprised 1.2% of the population.

2010 census

The 2010 census recorded a population of 12,453 in the county, with a population density of . There were 5,530 housing units, of which 5,131 were occupied.

2000 census

At the 2000 census, there were 12,369 people, 4,984 households and 3,583 families residing in the county. The population density was . There were 5,304 housing units at an average density of . The racial makeup of the county was 98.97% White, 0.08% Black or African American, 0.02% Native American, 0.29% Asian, 0.15% from other races, and 0.48% from two or more races. 0.58% of the population were Hispanic or Latino of any race.

There were 4,984 households, of which 30.70% had children under the age of 18 living with them, 63.80% were married couples living together, 5.50% had a female householder with no husband present, and 28.10% were non-families. 25.50% of all households were made up of individuals, and 14.20% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 2.94.

25.20% of the population were under the age of 18, 6.30% from 18 to 24, 25.10% from 25 to 44, 24.10% from 45 to 64, and 19.30% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 95.70 males. For every 100 females age 18 and over, there were 92.10 males.

The median household income was $39,396, and the median family income was $46,627. Males had a median income of $32,006 and females $22,003. The per capita income was $19,142. About 3.30% of families and 4.60% of the population were below the poverty line, including 4.60% of those under age 18 and 5.70% of those age 65 or over.

Communities

Cities

Beaman
Conrad
Dike
Grundy Center
Holland
Morrison
Reinbeck
Stout
Wellsburg

Townships

Beaver Township
Black Hawk Township
Clay Township
Colfax Township
Fairfield Township
Felix Township
German Township
Grant Township
Lincoln Township
Melrose Township
Palermo Township
Pleasant Valley Township
Shiloh Township
Washington Township

Population ranking

The population ranking of the following table is based on the 2020 census of Grundy County.

† county seat

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! Rank

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! Population<br>(2020 Census)

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