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County ZIP codes · Wisconsin · FIPS 55061

Kewaunee County, WI ZIP Codes

Kewaunee County, Wisconsin has 6 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 4 of the residential ones lie mainly in Kewaunee County and 2 mainly in a neighboring county; 5 cross the county line. Median household income ranges from $67,542 in 54201 (Algoma) to $97,292 in 54213 (Forestville) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Kewaunee County?

54201 · Algoma: $68k54205 · Casco: $91k54208 · Denmark: $96k54213 · Forestville: $97k54216 · Kewaunee: $84k54217 · Luxemburg: $90k54208542175421654201542055421354201 · Algoma: $68k54205 · Casco: $91k54208 · Denmark: $96k54213 · Forestville: $97k54216 · Kewaunee: $84k54217 · Luxemburg: $90k54208542175421654201542055421354201 · Algoma: $68k54205 · Casco: $91k54208 · Denmark: $96k54213 · Forestville: $97k54216 · Kewaunee: $84k54217 · Luxemburg: $90k542085421754216542015420554213
The residential ZIP codes of Kewaunee 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 $83,813 and $90,781.

They carry 6 postal town names: Luxemburg, Denmark, Kewaunee, Algoma, Casco, Forestville.

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

All 6 residential ZIP codes in Kewaunee County

4 ZIP codes lie mainly in Kewaunee County; 2 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Kewaunee County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
54217 Luxemburg 8,022 72 $90k $285k 80%
54216 Kewaunee 6,075 57 $84k $186k 100%
54201 Algoma 5,209 69 $68k $183k 92%
54205 Casco 2,229 51 $91k $253k 98%

Partly in Kewaunee County

Residential ZIP codes mainly in another county that reach at least 1% into Kewaunee County, by their share here
In this county
54208 Denmark 6,231 63 $96k $301k 29%
54213 Forestville 1,395 36 $97k $207k 10%

Download the 6 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?

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

Share of each ZIP code's land in Kewaunee County and in the neighboring counties
ZIPIn KewauneeElsewhere
5421780%Brown County 12%; Door County 8%
5420829%Brown County 59%; Manitowoc County 12%
5420192%Door County 8%
5420598%Door County 2%
5421310%Door County 90%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Kewaunee County starts with 542.

Three-digit prefixes of Kewaunee 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 Kewaunee County's
PrefixSectional centerHereAll codes
542 Green Bay, WI (SCF 541) 6 30

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