Marshall County, Iowa Facts for Kids

Quick facts for kids Marshall County
U.S. county
The courthouse in Marshalltown is on the NRHP
Location within the U.S. state of Iowa
Iowa's location within the U.S.
Country	United States
State	Iowa
Founded	1846
Named for	John Marshall
Seat	Marshalltown
Largest city	Marshalltown
Area
• Total	573 sq mi (1,480 km²)
• Land	572 sq mi (1,480 km²)
• Water	0.7 sq mi (2 km²) 0.1%
Population (2020)
• Total	40,105
• Estimate (2023)	40,014
• Density	69.99/sq mi (27.024/km²)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	1st

Marshall County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 40,105. The county seat and largest city is Marshalltown. The county was formed on January 13, 1846, and named after John Marshall, Chief Justice of the United States Supreme Court. Marshall County comprises the Marshalltown, Iowa Micropolitan Statistical Area. In 2010, the center of population of Iowa was located in Marshall County, near Melbourne.

Geography
Demographics
- 2020 census
- 2010 census
Communities
See also

Geography

According to the U.S. Census Bureau, the county has a total area of 573 square miles (1,480 km²), of which 573 square miles (1,480 km²) is land and 0.7 square miles (1.8 km²) (0.1%) is water.

Transit

Marshalltown Municipal Transit

Major highways

US 30
Iowa 14
Iowa 96
Iowa 146
Iowa 330

Adjacent counties

Jasper County (South)
Tama County (East)
Story County (West)
Hardin County (Northwest)
Grundy County (North)

Demographics

Historical population
Census	Pop.	%±
1850	338	—
1860	6,015	1,679.6%
1870	17,576	192.2%
1880	23,752	35.1%
1890	25,842	8.8%
1900	29,991	16.1%
1910	30,279	1.0%
1920	32,630	7.8%
1930	33,727	3.4%
1940	35,406	5.0%
1950	35,611	0.6%
1960	37,984	6.7%
1970	41,076	8.1%
1980	41,652	1.4%
1990	38,276	−8.1%
2000	39,311	2.7%
2010	40,648	3.4%
2020	40,105	−1.3%
2023 (est.)	40,014	−1.6%
U.S. Decennial Census 1790-1960 1900-1990 1990-2000 2010-2018

Population of Marshall County from US census data

2020 census

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

The 2020 census recorded a population of 40,105 in the county, with a population density of 70.1835/sq mi (27.0980/km²). 90.76% of the population reported being of one race. There were 16,745 housing units, of which 15,358 were occupied.

Marshall County Racial Composition
Race	Num.	Perc.
White (NH)	27,438	68.42%
Black or African American (NH)	785	2%
Native American (NH)	153	0.4%
Asian (NH)	1,514	3.8%
Pacific Islander (NH)	33	0.08%
Other/Mixed (NH)	1,042	2.6%
Hispanic or Latino	9,140	22.8%

2010 census

The 2010 census recorded a population of 40,648 in the county, with a population density of 71.0232/sq mi (27.4222/km²). There were 16,831 housing units, of which 15,538 were occupied.

Communities

Cities

Census-designated place

Green Mountain

Other unincorporated communities

Townships

Bangor
Eden
Greencastle
Iowa
Jefferson
Le Grand
Liberty
Liscomb
Logan
Marietta
Marion
Marshall
Minerva
State Center
Taylor
Timber Creek
Vienna
Washington

Population ranking

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

† county seat

Rank	City/Town/etc.	Municipal type	Population (2020 Census)
1	† Marshalltown	City	27,591
2	State Center	City	1,391
3	Le Grand (partially in Tama County)	City	905
4	Melbourne	City	786
5	Gilman	City	542
6	Albion	City	448
7	Liscomb	City	291
8	Rhodes	City	271
9	Laurel	City	220
10	Haverhill	City	165
11	Clemons	City	140
12	Green Mountain	CDP	113
13	Ferguson	City	97
14	St. Anthony	City	76

Marshall County, Iowa facts for kids

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