Decatur County, IA

County

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US Senator

Chuck Grassley

Republican Party

US Senator

Joni Ernst

Republican Party

2024 Median Age

36.1

0.276% 1-year decrease

About

None of the households in Decatur County, IA reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.

98.6% of the residents in Decatur County, IA are U.S. citizens.

Decatur County, IA borders Clarke County, IA, Lucas County, IA, Ringgold County, IA, Union County, IA, Wayne County, IA, Harrison County, MO, and Mercer County, MO.

United States Iowa

Population & Diversity

Decatur County, IA is home to a population of N/A people, from which 98.6% are citizens. As of N/A, NaNk% of Decatur County, IA residents were born outside of the country (N/A people).

Population & Diversity

Citizenship

98.6%

2024 Citizenship

98.5%

2023 Citizenship

As of 2024, 98.6% of Decatur County, IA residents were US citizens, which is higher than the national average of 93.2%. In 2023, the percentage of US citizens in Decatur County, IA was 98.5%, meaning that the rate of citizenship has been increasing.

The following chart shows US citizenship percentages in Decatur County, IA compared to that of it's neighboring and parent geographies.

Diversity

Global Diversity

The PUMS dataset is not available at the County level, so we are showing data for Decatur County, IA.

Most Common Origin

Mexico
44,333 ± N/A people
India
11,889 ± N/A people
Guatemala
8,189 ± N/A people

In 2024, the most common birthplace for the foreign-born residents of Decatur County, IA was Mexico, the natal country of 44,333 Decatur County, IA residents, followed by India with 11,889 and Guatemala with 8,189.

Military

Veterans

Most Common Service Period

Vietnam
180 ± 47
Gulf War (2001-)
36 ± 26
Korea
34 ± 33

Decatur County, IA has a large population of military personnel who served in Vietnam, 5 times greater than any other conflict.

The chart shows the distribution of veterans by conflict in Decatur County, IA.

Health

N/A% of the population of Decatur County, IA has health coverage, with N/A% on employee plans, N/A% on Medicaid, N/A% on Medicare, N/A% on non-group plans, and N/A% on military or VA plans.

By gender, of the total number of insured persons, N/A were men and N/A were women.

Coverage

Patient to Clinician Ratios

N/A to 1

Patient to Primary Care Physician Ratio in N/A

Primary care physicians in N/A see an average of N/A patients per year. This represents a N/A N/A from the previous year (N/A patients).

The following chart shows how the number of patients seen by primary care physicians has been changing over time in N/A in comparison to its neighboring geographies.

Economy

Industries

Employment by Industry Sector

Data is only available at the state level. Showing data for Iowa.

Y-Axis

1.48%

Year-over-year growth

Employment change between February 2022 and February 2023

As of February 2023, there are 1.57M people employed in Iowa. This represents a 1.48% increase in employment when compared to February 2022.

Right after the beginning of the COVID-19 pandemic, during April 2020, a general dip can be seen across industry sectors, resulting in an overall decline in employment by 10.9%.

The following chart shows monthly employment numbers for each industry sector in Iowa.

Civics

In the 2024 presidential election, the popular vote in Iowa went to Donald J. Trump with 55.7% of the vote. The runner-up was Kamala Harris (42.5%), followed by Robert Kennedy (0.789%).

Chuck Grassley and Joni Ernst are the senators currently representing the state of Iowa. In the United States, senators are elected to 6-year terms with the terms for individual senators staggered.

Iowa is currently represented by 4 members in the U.S. house, and members of the House of Representives are elected to 2-year terms.

Senator Elections

US Senators from Iowa

Senatorial voting results are only available at the state level. Showing data for Iowa.

Chuck Grassley

Senator from Iowa

Assumed office on January 3, 1981

Joni Ernst

Senator from Iowa

Assumed office on January 3, 2015

Chuck Grassley and Joni Ernst are the senators currently representing Iowa.

In the United States, senators are elected to 6-year terms with the terms for individual senators staggered.

The following chart shows elected senators in Iowa over time, excluding special elections, colored by their political party.

Education

Completions

Concentrations

In 2024, the most common concentation for N/A recipients in Decatur County, IA was N/A with N/A degrees awarded.

This visualization illustrates the percentage of students graduating with a N/A from schools in Decatur County, IA according to their major.

Housing & Living

In 2025, 12.6% of the population was living with severe housing problems in Decatur County, IA. From 2014 to 2025, the indicator declined 1.4%.

Housing

Rent vs Own

69.7%

Homeownership

2024

63%

Homeowners with Mortgage

2024

In 2024, 69.7% of the housing units in Decatur County, IA were occupied by their owner. This percentage grew from the previous year's rate of 68%.

This chart shows the percentage of owner in Decatur County, IA compared it's parent and neighboring geographies.

Transportation

Car Ownership

2 cars

Average Number

The following chart displays the households in Decatur County, IA distributed between a series of car ownership buckets compared to the national averages for each bucket. The largest share of households in Decatur County, IA have 2 cars.