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County ZIP codes · Iowa · FIPS 19043

Clayton County, IA ZIP Codes

Clayton County, Iowa has 24 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 15 of the residential ones lie mainly in Clayton County and 9 mainly in a neighboring county; 14 cross the county line. Median household income ranges from $52,625 in 52157 (McGregor) to $76,705 in 52043 (Elkader) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Clayton County?

50606 · Arlington: $61k52035 · Colesburg: $62k52042 · Edgewood: $96k52043 · Elkader: $77k52044 · Elkport: $76k52047 · Farmersburg: $59k52048 · Garber: $57k52049 · Garnavillo: $62k52050 · Greeley: $67k52052 · Guttenberg: $62k52053 · Holy Cross: $83k52066 · North Buena Vista: $52k52072 · Saint Olaf: $62k52073 · Sherrill: $96k52076 · Strawberry Point: $73k52077 · Volga: $77k52135 · Clermont: $88k52141 · Elgin: $65k52156 · Luana: $100k52157 · McGregor: $53k52158 · Marquette: $47k52159 · Monona: $74k52162 · Postville: $64k52169 · Wadena: $52k520525216252076520435215952141506065215652049520355207352157520425204852053520725205052169520475213552077520445206650606 · Arlington: $61k52035 · Colesburg: $62k52042 · Edgewood: $96k52043 · Elkader: $77k52044 · Elkport: $76k52047 · Farmersburg: $59k52048 · Garber: $57k52049 · Garnavillo: $62k52050 · Greeley: $67k52052 · Guttenberg: $62k52053 · Holy Cross: $83k52066 · North Buena Vista: $52k52072 · Saint Olaf: $62k52073 · Sherrill: $96k52076 · Strawberry Point: $73k52077 · Volga: $77k52135 · Clermont: $88k52141 · Elgin: $65k52156 · Luana: $100k52157 · McGregor: $53k52158 · Marquette: $47k52159 · Monona: $74k52162 · Postville: $64k52169 · Wadena: $52k520525216252076520435215952141506065215652049520355207352157520425204852053520725205052169520475213552077520445206650606 · Arlington: $61k52035 · Colesburg: $62k52042 · Edgewood: $96k52043 · Elkader: $77k52044 · Elkport: $76k52047 · Farmersburg: $59k52048 · Garber: $57k52049 · Garnavillo: $62k52050 · Greeley: $67k52052 · Guttenberg: $62k52053 · Holy Cross: $83k52066 · North Buena Vista: $52k52072 · Saint Olaf: $62k52073 · Sherrill: $96k52076 · Strawberry Point: $73k52077 · Volga: $77k52135 · Clermont: $88k52141 · Elgin: $65k52156 · Luana: $100k52157 · McGregor: $53k52158 · Marquette: $47k52159 · Monona: $74k52162 · Postville: $64k52169 · Wadena: $52k52052521625207652043521595214150606520495203552073521575205352072520505216952135
The residential ZIP codes of Clayton 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 $61,528 and $64,647.

They carry 24 postal town names.

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

All 24 residential ZIP codes in Clayton County

15 ZIP codes lie mainly in Clayton County; 9 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Clayton County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
52052 Guttenberg 2,999 33 $62k $197k 90%
52076 Strawberry Point 2,258 22 $73k $151k 83%
52043 Elkader 2,058 21 $77k $165k 100%
52042 Edgewood 1,804 30 $96k $234k 81%
52157 McGregor 1,451 26 $53k $194k 100%
52049 Garnavillo 1,370 20 $62k $171k 100%
52035 Colesburg 1,331 27 $62k $139k 62%
52156 Luana 769 16 $100k $226k 73%
52047 Farmersburg 462 12 $59k $96k 100%
52072 Saint Olaf 454 14 $62k $121k 100%
52077 Volga 313 10 $77k – 100%
52044 Elkport 297 23 $76k $97k 100%
52158 Marquette 290 226 $47k $161k 100%
52048 Garber 201 6 $57k $66k 100%
52066 North Buena Vista 124 46 $52k $104k 100%

Partly in Clayton County

Residential ZIP codes mainly in another county that reach at least 1% into Clayton County, by their share here
In this county
52159 Monona 2,398 33 $74k $165k 49%
52141 Elgin 1,259 15 $65k $116k 42%
52162 Postville 3,744 39 $64k $133k 27%
52053 Holy Cross 1,148 20 $83k $252k 22%
52050 Greeley 422 13 $67k $232k 12%
52073 Sherrill 1,381 29 $96k $297k 8%
52135 Clermont 834 30 $88k $121k 8%
52169 Wadena 367 11 $52k $113k 6%
50606 Arlington 803 12 $61k $130k 4%

Download the 24 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 Clayton County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Clayton County and in the neighboring counties
ZIPIn ClaytonElsewhere
5216227%Allamakee County 60%; Winneshiek County 10%; Fayette County 3%
5205290%Dubuque County 11%
5215949%Allamakee County 51%
5207683%Delaware County 16%
5204281%Delaware County 19%
520738%Dubuque County 92%
5203562%Delaware County 38%
5214142%Fayette County 58%
5205322%Dubuque County 78%
521358%Fayette County 92%
506064%Fayette County 96%
5215673%Allamakee County 27%
5205012%Delaware County 88%
521696%Fayette County 94%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Clayton County's ZIP codes use 3 prefixes: 506, 520 and 521.

Three-digit prefixes of Clayton 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 Clayton County's
PrefixSectional centerHereAll codes
506 Waterloo, IA (SCF 506) 1 70
520 Cedar Rapids, IA (SCF 522) 15 46
521 Waterloo, IA (SCF 506) 8 33

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