![]() The population density was 20 people per square mile (7.7 people/km 2). 2000 census 2000 Census Age Pyramid for Calhoun CountyĪs of the census of 2000, there were 11,115 people, 4,513 households, and 3,014 families residing in the county. There were 5,108 housing units, of which 4,242 were occupied. The 2010 census recorded a population of 9,670 in the county, with a population density of 16.96/sq mi (6.55/km 2). There were 4,771 housing units of which 4,070 were occupied. 91.88% were non-Hispanic White, 1.53% were Black, 2.38% were Hispanic, 0.24% were Native American, 0.26% were Asian, 0.08% were Native Hawaiian or Pacific Islander and 3.63% were some other race or more than one race. 97.22% of the population reported being of one race. The 2020 census recorded a population of 9,927 in the county, with a population density of 17.3722/sq mi (6.7074/km 2). Population of Calhoun County from US census data 2020 census Major highways ĭemographics Historical population Census Only a small fraction of the wetlands remain, and many natural lakes have been drained as a result of agricultural drainage projects via drainage tiles or ditches. Most of the region has been converted from wet prairie to agricultural use with substantial surface water drainage. Almost all of the natural lakes of Iowa are found in the northern part of this region (the Iowa Great Lakes). The stream network is poorly developed and widely spaced, with major rivers carving valleys that are relatively deep and steep-sided. The lobe does not have any loess deposits like the Loess Hills to the west. ![]() In general, the land is level to gently rolling with some areas of relief defined by glacial features like moraines, hummocky knobs, and kettles, and outwash deposits. One of the flattest regions in Iowa, the Des Moines Lobe ecoregion is a distinctive area naturally defined by Wisconsin glaciation but modified by humans for extensive agriculture. Ecology Ĭalhoun County is located entirely within the Des Moines Lobe of the Western Corn Belt Plains ecoregion, as defined by the United States Environmental Protection Agency (EPA). Census Bureau, the county has a total area of 572 square miles (1,480 km 2), of which 570 square miles (1,500 km 2) is land and 2.1 square miles (5.4 km 2) (0.4%) is water. The tornado killed 71 people and injured 200.Īccording to the U.S. With a damage path 500 yards (460 m) wide and 55 miles (89 km) long, the tornado destroyed about 80% of the homes in Pomeroy. On July 6, 1893, Pomeroy was struck by a tornado that measured F5 on the Fujita scale. In 1913, the current courthouse was built. The first courthouse, built of wood, burned to the ground in 1884 and the county government moved into a nearby hotel. The first train reached Rockwell City on August 7, 1882, and the population count doubled in the same year. Illinois Central Railroad were laid through the county in 1870, the county seat was moved from Lake City to Rockwell City. ![]() It was renamed in 1853 after the seventh US vice president secessionist John C. ( March 2014) ( Learn how and when to remove this template message)Ĭalhoun County was formed on January 15, 1851, from open land originally named Fox County. Unsourced material may be challenged and removed. Please help improve this section by adding citations to reliable sources.
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