Clay County, Iowa
Clay County: county in Iowa, United States.
About
Clay County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 16,667 and a population density of 11 people per km². After 10 years in 2020 county had an estimated population of 15,976 inhabitants. Its county seat is Spencer. The county was created 175 years ago in 1850.
County Snapshot
Clay County at a glance
Clay County currently has 1 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
1
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
SpencerPopulation 10,989
Top linked places
Quick Facts about Clay County
| Population | 15,976 (2020) |
| Country | United States of America |
| State | Iowa (United States) |
| Different from | Clay County, Clay County, Clay County, Clay County, Clay County, Clay County, Clay County, Clay County, Clay County, Clay County, Clay County, Clay County, Clay County, Clay County, Clay County, Clay County, Clay County |
| Twitter username | claycountyiowa |
| Area | 1483 km2 |
| Water as percent of area | 0.9% |
| Land as percent of area | 99.1% |
| Latitude & Longitude | 43.0826,-95.1509 |
| Named for | Henry Clay |
| Capital | Spencer |
| Establishment | January 01, 1851 |
| Time Zone | America/Chicago |
| Local time | 07:04:44 (23rd September 2026) |
| Density | 11 Pop. per km² as of 2020 |
| Population growth | -4.15% (2010-2020) |
| Weather | 70℉ Slight Chance Rain Showers 7-days weather |
Geography
Clay County is located at 43°4'57"N 95°9'3"W (43.0825800, -95.1509200). It has 2 neighbors: Buena Vista County and Dickinson County.
Clay County map
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The largest city of Clay County is Spencer with a population of 10,989. . See all Clay County cities & populated places.
Clay County Populated Places
Cities, towns, neighborhoods & other populated places in Clay County.
| City Name | Population | Title |
|---|---|---|
| Spencer | 10,989 | City in the state of Iowa (United States) |
Weather
A slight chance of rain showers after 7am. Partly sunny, with a high near 70.
7-Day Forecast- Spencer
Demographics
According to census records, the population of Clay County decreased by 4.15% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 16,667 | - | census |
| 2011 | 16,597 | -0.42% | estimation process |
| 2012 | 16,539 | -0.35% | estimation process |
| 2013 | 16,438 | -0.61% | estimation process |
| 2014 | 16,484 | 0.28% | estimation process |
| 2015 | 16,498 | 0.08% | estimation process |
| 2016 | 16,295 | -1.23% | estimation process |
| 2017 | 16,141 | -0.95% | estimation process |
| 2018 | 16,106 | -0.22% | estimation process |
| 2019 | 16,016 | -0.56% | estimation process |
| 2020 | 15,976 | -0.25% | estimation process |
People born in Clay County (1)
American lawyer Glenn E. Plumb was born in Clay County
Other places with the same name (17)
- Clay County, Missouri county in North Carolina, United States. with a population of 253,463 people.
- Clay County, Florida county in Florida, United States. with a population of 221,770 people.
- Clay County, Minnesota county in Minnesota, United States. with a population of 64,690 people.
- Clay County, Indiana county in Indiana, United States. with a population of 26,246 people.
- Clay County, Kentucky county in Kentucky, United States. with a population of 19,631 people.
- Clay County, Mississippi county in Mississippi, United States. with a population of 19,352 people.
- Clay County, Arkansas county in Arkansas, United States. with a population of 14,375 people.
- Clay County, South Dakota county in Clay County South Dakota, United States. with a population of 14,246 people.
- Clay County, Alabama county in Alabama, United States. with a population of 13,112 people.
- Clay County, Illinois county in Illinois, United States. with a population of 13,079 people.
- Clay County, North Carolina county in North Carolina, United States. with a population of 11,505 people.
- Clay County, Texas county in Texas, United States. with a population of 10,550 people.
- Clay County, West Virginia county in West Virginia, United States. with a population of 8,341 people.
- Clay County, Kansas county in Kansas, United States. with a population of 8,025 people.
- Clay County, Tennessee county in Tennessee, United States. with a population of 7,629 people.
- Clay County, Nebraska county in Nebraska, United States. with a population of 6,216 people.
- Clay County, Georgia county in Georgia, United States. with a population of 2,866 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. |