ZIP codes

ZIP codes in Whatcom County, Washington

Whatcom County has 18 ZIP codes. 14 lie entirely inside it and 4 are shared with neighboring counties, so part of their land and their people are elsewhere. About 230,501 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 18; With 1% or more of their land inside
Entirely inside: 14; 99% or more of their land
Shared with other counties: 4; Most with Skagit County (4)
Most populated ZIP: 98225; 50,216 people · Bellingham
Least populated ZIP: 98283; 442 people · Rockport
Largest ZIP by land: 98283; 468 sq mi · Rockport

Map of the ZIP codes in Whatcom 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 Whatcom County

18 ZIP codes in Whatcom County, WA, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
98220	Acme	541	100%	541
98225	Bellingham	50,216	100%	50,216
98226	Bellingham	46,782	100%	46,782
98229	Bellingham	33,298	95%	≈ 33,036
98230	Birch Bay	18,744	100%	18,744
98237	Concrete	4,956	15%	≈ 158
98240	Custer	3,593	100%	3,593
98244	Kendall	2,994	100%	2,994
98247	Deming	9,115	100%	9,115
98248	Ferndale	28,498	100%	28,498
98262	—	957	100%	957
98264	Lynden	23,123	100%	23,123
98266	Peaceful Valley	4,245	100%	4,245
98276	Nooksack	1,794	100%	1,794
98281	Point Roberts	1,288	100%	1,288
98283	Rockport	442	96%	≈ 372
98284	Sedro-Woolley	27,835	7.4%	≈ 1,766
98295	Sumas	3,279	100%	3,279

ZIP codes shared with other counties

These 4 ZIP codes have part of their land in another county. The first figure is the share of their land in Whatcom County; then, where the rest lies.

98229 (Bellingham): 95% here; 5.0% in Skagit County.
98237 (Concrete): 15% here; 85% in Skagit County.
98283 (Rockport): 96% here; 4.2% in Skagit County.
98284 (Sedro-Woolley): 7.4% here; 93% in Skagit 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 Bellingham (3), Acme (1), Birch Bay (1), Concrete (1), Custer (1), and Deming (1); 15 places in all.

All 18 start with the same three digits, 982: the prefix of the USPS sorting center that handles them.

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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