Grundy County, Iowa Facts for Kids

Quick facts for kids Grundy County
U.S. county
Grundy County Courthouse
Location within the U.S. state of Iowa
Iowa's location within the U.S.
Country	United States
State	Iowa
Founded	1851
Named for	Felix Grundy
Seat	Grundy Center
Largest city	Grundy Center
Area
• Total	502 sq mi (1,300 km²)
• Land	502 sq mi (1,300 km²)
• Water	0.04 sq mi (0.1 km²) 0.01%
Population (2020)
• Total	12,329
• Density	24.560/sq mi (9.483/km²)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	4th

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
Geography
- Major highways
- Adjacent counties
Demographics
- 2020 census
- 2010 census
Communities
See also

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 502 square miles (1,300 km²), of which 502 square miles (1,300 km²) is land and 0.04 square miles (0.10 km²) (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

Historical population
Census	Pop.	%±
1860	793	—
1870	6,399	706.9%
1880	12,639	97.5%
1890	13,215	4.6%
1900	13,757	4.1%
1910	13,574	−1.3%
1920	14,420	6.2%
1930	14,133	−2.0%
1940	13,518	−4.4%
1950	13,722	1.5%
1960	14,132	3.0%
1970	14,119	−0.1%
1980	14,366	1.7%
1990	12,029	−16.3%
2000	12,369	2.8%
2010	12,453	0.7%
2020	12,329	−1.0%
2023 (est.)	12,384	−0.6%
U.S. Decennial Census 1790-1960 1900-1990 1990-2000 2010-2018

Population of Grundy County from US census data

2020 census

2022 US Census population pyramid for Grundy County from ACS 5-year estimates

The 2020 census recorded a population of 12,329 in the county, with a population density of 24.5631/sq mi (9.4839/km²). 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 24.7816/sq mi (9.5682/km²). There were 5,530 housing units, of which 5,131 were occupied.

Communities

Cities

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

Rank	City/Town/etc.	Municipal type	Population (2020 Census)
1	† Grundy Center	City	2,796
2	Reinbeck	City	1,662
3	Dike	City	1,304
4	Conrad	City	1,093
5	Wellsburg	City	720
6	Holland	City	269
7	Stout	City	191
8	Beaman	City	161
9	Morrison	City	98

Grundy County, Iowa facts for kids

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