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Clay County, Iowa facts for kids

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Clay County, Iowa
Map
Map of Iowa highlighting Clay County
Location in the state of Iowa
Map of the USA highlighting Iowa
Iowa's location in the U.S.
Statistics
Founded 1851
Seat Spencer
Largest City Spencer
Area
 - Total
 - Land
 - Water

573 sq mi (1,484 km²)
567 sq mi (1,469 km²)
5.4 sq mi (14 km²), 0.9%
PopulationEst.
 - (2015)
 - Density

16,507
29/sq mi (11/km²)
Time zone Central: UTC-6/-5
Website: www.co.clay.ia.us
Named for: Henry Clay, Jr

Clay County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 16,667. Its county seat is Spencer. Its name is in honor of Henry Clay, Jr., a colonel who died in action in the Mexican-American War, and son of Henry Clay, famous American statesman.

Clay County comprises the Spencer, IA Micropolitan Statistical Area.

Clay County holds the annual Clay County Fair. The very first newspaper in Clay County was the Peterson Patriot which started circulation in 1880.

Geography

According to the U.S. Census Bureau, the county has a total area of 573 square miles (1,480 km2), of which 567 square miles (1,470 km2) is land and 5.4 square miles (14 km2) (0.9%) is water. Clay County is home to the large Barringer Slough wetland.

Major highways

  • US 18 (IA).svg U.S. Highway 18
  • US 71 (IA).svg U.S. Highway 71
  • Iowa 10.svg Iowa Highway 10

Adjacent counties

Demographics

Historical population
Census Pop.
1860 52
1870 1,523 2,828.8%
1880 4,248 178.9%
1890 9,309 119.1%
1900 13,401 44.0%
1910 12,766 −4.7%
1920 15,660 22.7%
1930 16,107 2.9%
1940 17,762 10.3%
1950 18,103 1.9%
1960 18,504 2.2%
1970 18,464 −0.2%
1980 19,576 6.0%
1990 17,585 −10.2%
2000 17,372 −1.2%
2010 16,667 −4.1%
Est. 2015 16,507 −1.0%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2013

2010 census

The 2010 census recorded a population of 16,667 in the county, with a population density of 29.292/sq mi (11.310/km2). There were 8,062 housing units, of which 7,282 were occupied.

2000 census

USA Clay County, Iowa age pyramid
2000 Census Age Pyramid for Clay County

As of the census of 2000, there were 17,372 people, 7,259 households, and 4,776 families residing in the county. The population density was 30 people per square mile (12/km²). There were 7,828 housing units at an average density of 14 per square mile (5/km²). The racial makeup of the county was 98.08% White, 0.17% Black or African American, 0.10% Native American, 0.82% Asian, 0.03% Pacific Islander, 0.25% from other races, and 0.55% from two or more races. 1.13% of the population were Hispanic or Latino of any race.

There were 7,259 households out of which 30.70% had children under the age of 18 living with them, 55.60% were married couples living together, 6.80% had a female householder with no husband present, and 34.20% were non-families. 29.80% of all households were made up of individuals and 13.70% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the average family size was 2.92.

In the county, the population was spread out with 24.70% under the age of 18, 8.00% from 18 to 24, 26.90% from 25 to 44, 22.50% from 45 to 64, and 18.00% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 93.30 males. For every 100 females age 18 and over, there were 90.90 males.

The median income for a household in the county was $35,799, and the median income for a family was $42,769. Males had a median income of $30,163 versus $21,068 for females. The per capita income for the county was $19,451. About 6.30% of families and 8.20% of the population were below the poverty line, including 11.10% of those under age 18 and 8.10% of those age 65 or over.

Communities

Cities

Townships

Clay County is divided into these townships:

  • Clay
  • Douglas
  • Freeman
  • Garfield
  • Gillett Grove
  • Herdland
  • Lake
  • Lincoln
  • Logan
  • Lone Tree
  • Meadow
  • Peterson
  • Riverton
  • Sioux
  • Summit
  • Waterford

Population ranking

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

county seat

Rank City/Town/etc. Municipal type Population (2010 Census)
1 Spencer City 11,233
2 Everly City 603
3 Royal City 446
4 Peterson City 334
5 Fostoria City 231
6 Dickens City 185
7 Webb City 141
8 Greenville City 75
9 Rossie City 70
10 Gillett Grove City 49
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