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Monona County, Iowa facts for kids

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Monona County
Monona County Courthouse
Map of Iowa highlighting Monona County
Location within the U.S. state of Iowa
Map of the United States highlighting Iowa
Iowa's location within the U.S.
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Country  United States
State  Iowa
Founded 1851
Seat Onawa
Largest city Onawa
Area
 • Total 699 sq mi (1,810 km2)
 • Land 694 sq mi (1,800 km2)
 • Water 4.9 sq mi (13 km2)  0.7%
Population
 (2020)
 • Total 8,751
 • Density 12.519/sq mi (4.834/km2)
Time zone UTC−6 (Central)
 • Summer (DST) UTC−5 (CDT)
Congressional district 4th

Monona County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 8,751. The county seat is Onawa.

History

Monona County was formed in 1851. It was perhaps named for the Indian word meaning "beautiful valley."

When Ashton (originally called Bloomfield ) was named the county seat in the fall of 1854, a log house served as the first courthouse. Ashton remained the county seat for only four years. On April 5, 1858, Onawa was voted the permanent seat of the county.

The first Monona County Courthouse was completed in 1858.

Geography

According to the U.S. Census Bureau, the county has a total area of 699 square miles (1,810 km2), of which 694 square miles (1,800 km2) is land and 4.9 square miles (13 km2) (0.7%) is water.

Major highways

  • I-29.svg Interstate 29
  • Iowa 37.svg Iowa Highway 37
  • Iowa 141.svg Iowa Highway 141
  • Iowa 175.svg Iowa Highway 175
  • Iowa 183.svg Iowa Highway 183

Adjacent counties

Demographics

Historical population
Census Pop.
1860 832
1870 3,654 339.2%
1880 9,055 147.8%
1890 14,515 60.3%
1900 17,980 23.9%
1910 16,633 −7.5%
1920 17,125 3.0%
1930 18,213 6.4%
1940 18,238 0.1%
1950 16,303 −10.6%
1960 13,916 −14.6%
1970 12,069 −13.3%
1980 11,692 −3.1%
1990 10,034 −14.2%
2000 10,020 −0.1%
2010 9,243 −7.8%
2020 8,751 −5.3%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2018
MononaCountyIowaPop2020
Population of Monona County from US census data

2020 census

The 2020 census recorded a population of 8,751 in the county, with a population density of 12.5221/sq mi (4.8348/km2). 96.03% of the population reported being of one race. 90.33% were non-Hispanic White, 0.32% were Black, 2.70% were Hispanic, 1.67% were Native American, 0.32% were Asian, 0.02% were Native Hawaiian or Pacific Islander and 4.64% were some other race or more than one race. There were 4,373 housing units, of which 3,839 were occupied.

2010 census

The 2010 census recorded a population of 9,243 in the county, with a population density of 13.3354/sq mi (5.1488/km2). There were 4,697 housing units, of which 4,050 were occupied.

Communities

Population ranking

The population ranking of the following table is based on the 2010 census of Monona County.

county seat

Rank City/Town/etc. Municipal type Population (2010 Census)
1 Onawa City 2,998
2 Mapleton City 1,224
3 Whiting City 762
4 Ute City 374
5 Moorhead City 226
6 Blencoe City 224
7 Soldier City 174
8 Castana City 147
9 Turin City 68
10 Rodney City 60
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