ZIP Codes of Decatur County, IA

Population & People
Population & People
Total Population
7,999
Household Income
Household Income
Median Income
$57,820
Housing
Housing
Total Housing Units
3,752
Business & Economy
Business & Economy
Total Businesses
154
Employment
Employment
Employment Rate
60.34%
Education
Education
Bachelor's Degree+
23.76%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 8 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:8 ZIP Codes (8 Standard, 0 PO Box, 0 Unique) [See All]
Area Code:641
Timezone:Central (GMT -06:00)
Local Time:2:11:51 PM
Population:7,999 [See All]
FIPS:19053
Land Area:554 sq mi
Water Area:2 sq mi
Coordinates:40.7613, -93.7999
Quick Link:
https://www.zip-codes.com/county/ia-decatur.asp
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Striking education divide
Bachelor's share spans 8.4% to 44.6% — a 36-point gap.

Standout ZIPs in this County


Most Populous
Lamoni · 2,842 people
35.5% of county total
Highest Income
Van Wert · $81,875 median
1.4× county average
Largest Land Area
Leon · 136.0 sq mi
Spans the most ground
Fastest Growth
Leon · 0.0% (10-yr)
2,691 → 2,692 residents
Most Educated
Lamoni · 44.6% bachelor's+
690 of 1,548 adults 25+

Things worth knowing about Decatur County


7,999 residents live across 8 ZIPs covering 554 sq mi, served by 8 distinct USPS-recognized cities.

Population moved from 8,398 to 7,999 from 2014 to 2024 — a -4.8% change. 4 ZIPs gained residents, 4 lost.

The county's wealthiest ZIP 50262 (Van Wert, $81,875 median) and poorest ZIP 50108 (Grand River, $38,125) are 7.7 miles apart — a 2.1× income gap across local geography.

Median home values vary 2.9× across this county — from $46,300 in 50108 (Grand River) to $136,100 in 50264 (Weldon).

Density varies across the county — from 5 people/sq mi in 50108 (Grand River) to 34 in 50140 (Lamoni).

Educational attainment ranges from 8.4% bachelor's+ in 50067 (Decatur) to 44.6% in 50140 (Lamoni) — the breadth of educational profiles across the area.

Within Iowa, this is the #86 most populous of 99 counties and ranks #98 for median household income .

Weighted by population, the typical household earns about $59,017 across the county — reflecting what a typical resident sees, not a simple ZIP average.

23.8% of adults age 25+ hold a bachelor's degree or higher (1,174 of 4,941 reporting).

8 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Decatur County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
554
square miles
Avg density
14.4
people per sq mi
Population
7,999
across 8 ZIPs
Leon
136.0 sq mi
2,692 residents
Lamoni
83.9 sq mi
2,842 residents
Grand River
73.5 sq mi
376 residents

All ZIP Codes in Decatur County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
50140LamoniStandard2,842$57,44383.9-9.8%
50144LeonStandard2,692$63,333136.00.0%
50065Davis CityStandard517$49,42355.6-9.0%
50264WeldonStandard502$64,54563.646.4%
50103Garden GroveStandard453$64,06364.64.4%
50108Grand RiverStandard376$38,12573.5-13.2%
50067DecaturStandard354$43,75038.921.2%
50262Van WertStandard263$81,87537.7-45.8%

Adjacent & Nearby Counties