Decatur County, Iowa
Decatur County: county in Iowa, United States
About
Decatur County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 8,457 and a population density of 6 people per km². After 10 years in 2020 county had an estimated population of 7,769 inhabitants. Its county seat is Leon. The county was created 180 years ago in 1845.
County Snapshot
Decatur County at a glance
Decatur County currently has 10 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
10
These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.
Iowa counties
99
Open related pagesLargest city
LamoniPopulation 2,196
Top linked places
Quick Facts about Decatur County
| Population | 7,769 (2020) |
| Country | United States of America |
| State | Iowa (United States) |
| Different from | Decatur County, Decatur County, Decatur County, Decatur County |
| Area | 1381 km2 |
| Water as percent of area | 0.3% |
| Land as percent of area | 99.7% |
| Latitude & Longitude | 40.7377,-93.7863 |
| Named for | Stephen Decatur |
| Capital | Leon |
| Establishment | January 01, 1846 |
| Time Zone | America/Chicago |
| Local time | 05:15:25 (19th April 2026) |
| Density | 6 Pop. per km² as of 2020 |
| Population growth | -8.86% (2010-2020) |
| Weather | 64℉ Sunny 7-days weather |
Geography
Decatur County is located at 40°44'16"N 93°47'11"W (40.7376800, -93.7862800). It has 5 neighbors: Clarke County, Ringgold County, Wayne County, Harrison County and Mercer County.
Decatur County map
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The largest city of Decatur County is Lamoni with a population of 2,196. Other cities include, Leon population 1,808, Van Wert population 208, Davis City population 184 and Decatur City population 184. See all Decatur County cities & populated places.
Decatur County Populated Places
Cities, towns, neighborhoods & other populated places in Decatur County.
| City Name | Population | Title |
|---|---|---|
| Lamoni | 2,196 | City in Iowa, United States |
| Leon | 1,808 | City in Iowa, USA |
| Grand River | 215 | Township in Decatur County, Iowa |
| Van Wert | 208 | Human settlement in Decatur County, Iowa, United States of America |
| Garden Grove | 200 | Township in Decatur County, Iowa |
| Davis City | 184 | Human settlement in Decatur County, Iowa, United States of America |
| Decatur City | 184 | Human settlement in Decatur County, Iowa, United States of America |
| Weldon | 104 | City in Iowa, USA |
| Pleasanton | 44 | City in Iowa, United States |
| Le Roy | 14 | Human settlement in Decatur County, Iowa, United States of America |
Official website of Decatur County
Official Website- Leon
Demographics
According to census records, the population of Decatur County decreased by 8.86% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 8,457 | - | census |
| 2011 | 8,249 | -2.52% | estimation process |
| 2012 | 8,239 | -0.12% | estimation process |
| 2013 | 8,216 | -0.28% | estimation process |
| 2014 | 8,209 | -0.09% | estimation process |
| 2015 | 8,137 | -0.88% | estimation process |
| 2016 | 8,053 | -1.04% | estimation process |
| 2017 | 7,947 | -1.33% | estimation process |
| 2018 | 7,890 | -0.72% | estimation process |
| 2019 | 7,870 | -0.25% | estimation process |
| 2020 | 7,769 | -1.3% | estimation process |
People born in Decatur County (1)
American politician Arlo Hullinger was born in Decatur County
Other places with the same name (4)
- Decatur County, Indiana county in Indiana, United States with a population of 26,584 people.
- Decatur County, Georgia county in Tennessee, United States with a population of 26,457 people.
- Decatur County, Tennessee county in Tennessee, United States with a population of 11,601 people.
- Decatur County, Kansas county in Kansas, United States with a population of 2,776 people.
Iowa Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Indiana | 820,445 | A city located in the state of Iowa. |
| Polk County | 494,281 | County in Iowa, United States |
| Linn County | 227,854 | County in Oregon, United States |
| Des Moines | 212,312 | The capital of Iowa. |
| Scott County | 173,216 | County in Tennessee, United States |
| Johnson County | 153,740 | County in Iowa, United States |
| Cedar Rapids | 134,027 | The second most populous city in Iowa. |
| Black Hawk County | 130,786 | County in Iowa, United States |
| Woodbury County | 103,138 | County in Iowa, United States of America |
| Davenport | 101,799 | The most populous city in Scott County, Iowa. |
| Story County | 98,237 | County in Iowa, United States |
| Dubuque County | 97,590 | County in Iowa, United States |
| Dallas County | 96,963 | County in Iowa, United States |
| Pottawattamie County | 93,328 | County in Iowa, United States of America |
| Sioux City | 82,651 | The second most populous city in Iowa. |
| Iowa City | 75,130 | The most populous city in Johnson County, Iowa. |