ZIP codes

ZIP codes in Brown County, Wisconsin

Brown County has 19 ZIP codes. 9 lie entirely inside it and 10 are shared with neighboring counties, so part of their land and their people are elsewhere. About 270,204 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 19; With 1% or more of their land inside
Entirely inside: 9; 99% or more of their land
Shared with other counties: 10; Most with Outagamie County (6)
Most populated ZIP: 54115; 50,411 people · Hobart
Least populated ZIP: 54307; 1,128 people · Allouez
Largest ZIP by land: 54115; 124 sq mi · Hobart

Map of the ZIP codes in Brown County

Entirely in the county (99% or more of its land)
Shared, mostly in this county
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Brown County

19 ZIP codes in Brown County, WI, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
54110	Brillion	5,591	2.8%	≈ 80
54115	Hobart	50,411	85%	≈ 48,865
54126	Greenleaf	4,233	99.3%	≈ 4,215
54130	Kaukauna	28,380	10%	≈ 401
54155	Hobart	7,418	50%	≈ 6,376
54162	Pulaski	9,596	22%	≈ 4,709
54165	Seymour	7,786	1.1%	≈ 185
54173	Suamico	3,403	100%	3,403
54180	Wrightstown	3,378	85%	≈ 2,593
54208	Denmark	6,231	59%	≈ 4,563
54217	Luxemburg	8,022	12%	≈ 1,397
54229	Green Bay	4,329	100%	4,329
54301	Allouez	21,724	100%	21,724
54302	Green Bay	30,333	100%	30,333
54303	Green Bay	28,153	100%	28,153
54304	Ashwaubenon	28,502	100%	28,502
54307	Allouez	1,128	100%	1,128
54311	Green Bay	37,879	100%	37,879
54313	Suamico	41,422	99%	≈ 41,369

ZIP codes shared with other counties

These 10 ZIP codes have part of their land in another county. The first figure is the share of their land in Brown County; then, where the rest lies.

54110 (Brillion): 2.8% here; 73% in Calumet County and 24% in Manitowoc County.
54115 (Hobart): 85% here; 15% in Outagamie County.
54130 (Kaukauna): 10% here; 79% in Outagamie County and 11% in Calumet County.
54155 (Hobart): 50% here; 50% in Outagamie County.
54162 (Pulaski): 22% here; 61% in Shawano County and 16% in Oconto County.
54165 (Seymour): 1.1% here; 88% in Outagamie County and 11% in Shawano County.
54180 (Wrightstown): 85% here; 15% in Outagamie County.
54208 (Denmark): 59% here; 29% in Kewaunee County and 12% in Manitowoc County.
54217 (Luxemburg): 12% here; 80% in Kewaunee County and 7.9% in Door County.
54313 (Suamico): 99% here; 1.3% in Outagamie County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Green Bay (4), Allouez (2), Hobart (2), Suamico (2), Ashwaubenon (1), and Brillion (1); 13 places in all.

They start with 3 different three-digit prefixes, one per USPS sorting center: 541, 542, and 543.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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