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Decatur County, IA
10 cities and towns and 9 ZIP codes in Decatur County, Iowa.
Population
7,759
Land area
532sq mi
People per sq mi
15
ZIP codes
9
Cities and towns in Decatur County
Decatur County at a glance
- Decatur County is 75% less dense than Iowa as a whole.
- The median household income is $59,044, 21% below the Iowa median of $75,059.
- A typical owner-occupied home is valued at $113,900 (45% below Iowa) and median rent is $611 a month.
- Its largest cities are Lamoni (2,207), Leon (1,899) and Decatur (190).
Local data for Decatur County, IA
Counts from official public data
Housing and community stats
Decatur County, IA, American Community Survey 2020-2024
Median household income
$59,044
Poverty rate
14.6%
Median home value
$113,900
Prices +1.4% in a year
Median rent
$611/mo
Homeownership
69.7%
Bachelor's or higher
23.5%
Median age
36.1
Average commute
22.5 min
Largest reported origins and ancestries: German Americans (1,520), Irish Americans (793), Dutch Americans (257).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
3.0%
Aug 2026, -0.1 pts in a year
Average annual pay
$43,151
2,312 jobs, 2025
Income per person
$46,134
BEA, 2024
Federal spending
$53.55M
FY 2026, $7,005 per person
PPP loans
$18.68M
738 loans, 2,044 jobs reported
Campaign donations
$25.78K
Itemized, 2026 cycle
How people get to work
Decatur County, IA, workers 16 and older. American Community Survey 5-year estimates
- Drove alone75.0%
- Carpooled10.2%
- Public transit0.0%
- Walked7.8%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other0.9%
- Worked from home6.0%
Average one-way commute: 22.5 minutes for people who do not work from home.
Environment and hazard risk
Decatur County, IA, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: drought
Storm events since 1996
427
Most often thunderstorm wind
July high / Jan low
86° / 13°F
39.3 inches of rain a year
Hazards, floods and storm historyCheck a flood zone7 historic places
Health statistics
Share of adults in Decatur County, IA, CDC PLACES estimates
Obesity
39.6%
U.S. 33.3% +6.3 pts
Diabetes
12.4%
U.S. 12.1% about the same
Smoking
15.9%
U.S. 12.8% +3.1 pts
Uninsured (18-64)
8.1%
U.S. 11.1% -3.0 pts
Cities, towns and ZIP codes in Decatur County
Population shown
Frequently asked questions
- What is the largest city in Decatur County, IA?
- Lamoni is the largest city or town in Decatur County, with about 2,207 residents.
- How many ZIP codes are in Decatur County?
- Decatur County includes 9 ZIP Code Tabulation Areas, including 50065, 50067, 50103, 50108, 50140.
- What is the population of Decatur County, IA?
- About 7,759 people live in Decatur County, based on American Community Survey 5-year estimates.
- What counties border Decatur County?
- Decatur County borders Union County, Clarke County, Lucas County, Harrison County, MO, Wayne County, Ringgold County, Mercer County, MO.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023