Grundy County is a county located in the U.S. state of Iowa. At the 2020 census, the population was 12,329. The county seat is Grundy Center. The county is named for Felix Grundy, former U.S. Attorney General.
Grundy County is included in the Waterloo-Cedar Falls, IA Metropolitan Statistical Area.
History
Grundy County was formed on January 15, 1851, and became self-governing in 1856. It was named after Felix Grundy of Tennessee, a statesman, Senator, member of the House of Representatives and Attorney General under President James K. Polk.
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 U.S. Census Bureau, the county has a total area of , of which is land and (0.01%) is water.
Major highways
U.S. Highway 20
Iowa Highway 14
Iowa Highway 57
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
2020 census
The 2020 census recorded a population of 12,329 in the county, with a population density of . 96.97% of the population reported being of one race. 94.83% were non-Hispanic White, 0.40% were Black, 1.18% were Hispanic, 0.08% were Native American, 0.19% were Asian, 0.00% were Native Hawaiian or Pacific Islander and 3.33% were some other race or more than one race. There were 5,465 housing units, of which 5,069 were occupied.
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
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.