Plain

County ZIP codes · Iowa · FIPS 19091

Humboldt County, IA ZIP Codes

Humboldt County, Iowa has 17 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 10 of the residential ones lie mainly in Humboldt County and 7 mainly in a neighboring county; 14 cross the county line. Median household income ranges from $56,364 in 50541 (Gilmore City) to $92,000 in 50597 (West Bend) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Humboldt County?

50430 · Corwith: $59k50516 · Badger: $70k50519 · Bode: $72k50520 · Bradgate: $74k50529 · Dakota City: $60k50533 · Eagle Grove: $66k50541 · Gilmore City: $56k50542 · Goldfield: $55k50545 · Hardy: $31k50548 · Humboldt: $76k50558 · Livermore: $69k50560 · Lu Verne: $66k50570 · Ottosen: $68k50577 · Renwick: $58k50582 · Rutland: $87k50591 · Thor: $75k50597 · West Bend: $92k5054850560505335059750541505425043050558505195057050545505165057750591505205058250430 · Corwith: $59k50516 · Badger: $70k50519 · Bode: $72k50520 · Bradgate: $74k50529 · Dakota City: $60k50533 · Eagle Grove: $66k50541 · Gilmore City: $56k50542 · Goldfield: $55k50545 · Hardy: $31k50548 · Humboldt: $76k50558 · Livermore: $69k50560 · Lu Verne: $66k50570 · Ottosen: $68k50577 · Renwick: $58k50582 · Rutland: $87k50591 · Thor: $75k50597 · West Bend: $92k5054850560505335059750541505425043050558505195057050545505165057750591505205058250430 · Corwith: $59k50516 · Badger: $70k50519 · Bode: $72k50520 · Bradgate: $74k50529 · Dakota City: $60k50533 · Eagle Grove: $66k50541 · Gilmore City: $56k50542 · Goldfield: $55k50545 · Hardy: $31k50548 · Humboldt: $76k50558 · Livermore: $69k50560 · Lu Verne: $66k50570 · Ottosen: $68k50577 · Renwick: $58k50582 · Rutland: $87k50591 · Thor: $75k50597 · West Bend: $92k5054850560505335059750541505425043050558505195054550516505775059150520
The residential ZIP codes of Humboldt 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?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $56,364 and $76,214.

They carry 17 postal town names.

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

All 17 residential ZIP codes in Humboldt County

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

Residential ZIP codes mainly in Humboldt County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
50548 Humboldt 5,722 46 $76k $188k 92%
50519 Bode 765 14 $72k $124k 55%
50529 Dakota City 752 1,483 $60k $120k 100%
50558 Livermore 653 13 $69k $124k 83%
50591 Thor 405 14 $75k $163k 88%
50577 Renwick 341 9 $58k $107k 57%
50570 Ottosen 203 5 $68k $202k 64%
50582 Rutland 170 8 $87k – 100%
50545 Hardy 139 4 $31k – 100%
50520 Bradgate 114 5 $74k $44k 93%

Partly in Humboldt County

Residential ZIP codes mainly in another county that reach at least 1% into Humboldt County, by their share here
In this county
50541 Gilmore City 1,067 12 $56k $96k 47%
50542 Goldfield 859 13 $55k $138k 31%
50516 Badger 586 23 $70k $127k 24%
50560 Lu Verne 732 9 $66k $84k 15%
50533 Eagle Grove 3,977 41 $66k $110k 11%
50597 West Bend 1,341 16 $92k $180k 1%
50430 Corwith 520 8 $59k $76k 1%

Download the 17 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?

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

Share of each ZIP code's land in Humboldt County and in the neighboring counties
ZIPIn HumboldtElsewhere
5054892%Webster County 8%
5053311%Wright County 79%; Webster County 9%
505971%Palo Alto County 55%; Kossuth County 42%
5054147%Pocahontas County 53%
5054231%Wright County 69%
5051955%Kossuth County 45%
5056015%Kossuth County 85%
5055883%Kossuth County 17%
5051624%Webster County 76%
504301%Hancock County 60%; Kossuth County 37%; Wright County 2%
5059188%Webster County 12%
5057757%Wright County 43%
5057064%Kossuth County 36%
5052093%Pocahontas County 7%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Humboldt County's ZIP codes use 2 prefixes: 504 and 505.

Three-digit prefixes of Humboldt 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 Humboldt County's
PrefixSectional centerHereAll codes
504 Waterloo, IA (SCF 506) 1 57
505 Des Moines, IA (SCF 500) 16 75

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