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County ZIP codes · Iowa · FIPS 19053

Decatur County, IA ZIP Codes

Decatur County, Iowa has 11 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 7 of the residential ones lie mainly in Decatur County and 4 mainly in a neighboring county; 6 cross the county line. Median household income ranges from $57,443 in 50140 (Lamoni) to $63,333 in 50144 (Leon) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Decatur County?

50065 · Davis City: $49k50067 · Decatur: $44k50103 · Garden Grove: $64k50108 · Grand River: $38k50123 · Humeston: $63k50133 · Kellerton: $58k50140 · Lamoni: $57k50144 · Leon: $63k50147 · Lineville: $38k50262 · Van Wert: $82k50264 · Weldon: $65k501445014050264501235014750108501335010350065500675026250065 · Davis City: $49k50067 · Decatur: $44k50103 · Garden Grove: $64k50108 · Grand River: $38k50123 · Humeston: $63k50133 · Kellerton: $58k50140 · Lamoni: $57k50144 · Leon: $63k50147 · Lineville: $38k50262 · Van Wert: $82k50264 · Weldon: $65k501445014050264501235014750108501335010350065500675026250065 · Davis City: $49k50067 · Decatur: $44k50103 · Garden Grove: $64k50108 · Grand River: $38k50123 · Humeston: $63k50133 · Kellerton: $58k50140 · Lamoni: $57k50144 · Leon: $63k50147 · Lineville: $38k50262 · Van Wert: $82k50264 · Weldon: $65k5014450140502645012350147501085013350103500655006750262
The residential ZIP codes of Decatur County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

They carry 11 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 11 residential ZIP codes in Decatur County

7 ZIP codes lie mainly in Decatur County; 4 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Decatur County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
50140 Lamoni 2,842 31 $57k $122k 69%
50144 Leon 2,692 19 $63k $131k 100%
50065 Davis City 517 10 $49k $93k 100%
50103 Garden Grove 453 8 $64k $94k 100%
50108 Grand River 376 5 $38k $46k 88%
50067 Decatur 354 10 $44k $106k 100%
50262 Van Wert 263 7 $82k $84k 100%

Partly in Decatur County

Residential ZIP codes mainly in another county that reach at least 1% into Decatur County, by their share here
In this county
50147 Lineville 463 7 $38k $103k 47%
50264 Weldon 502 7 $65k $136k 45%
50123 Humeston 883 11 $63k $115k 7%
50133 Kellerton 528 7 $58k $99k 2%

Download the 11 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

6 ZIP codes of Decatur County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Decatur County and in the neighboring counties
ZIPIn DecaturElsewhere
5014069%Ringgold County 31%
501237%Wayne County 80%; Lucas County 11%; Clarke County 2%
501332%Ringgold County 98%
5026445%Clarke County 55%
5014747%Wayne County 53%
5010888%Clarke County 12%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Decatur County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Decatur County's ZIP codes use 3 prefixes: 500, 501 and 502.

Three-digit prefixes of Decatur County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Decatur County's
PrefixSectional centerHereAll codes
500 Des Moines, IA (SCF 500) 2 68
501 Des Moines, IA (SCF 500) 7 69
502 Des Moines, IA (SCF 500) 2 65

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.