ZIP codes

ZIP codes in Jefferson County, Colorado

Jefferson County has 33 ZIP codes. 18 lie entirely inside it and 15 are shared with neighboring counties, so part of their land and their people are elsewhere. About 581,667 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 33; 1 more just touches the border (under 1% of their land)
Entirely inside: 18; 99% or more of their land
Shared with other counties: 15; Most with Adams County (5)
Most populated ZIP: 80401; 43,811 people · Golden
Least populated ZIP: 80425; 243 people; 1 more with nobody living there
Largest ZIP by land: 80403; 142 sq mi · Coal Creek

Map of the ZIP codes in Jefferson 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 Jefferson County

33 ZIP codes in Jefferson County, CO, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
80002	Arvada	21,270	96%	≈ 20,204
80003	Arvada	35,976	86%	≈ 30,807
80004	Arvada	33,700	100%	33,700
80005	Arvada	28,459	100%	28,459
80007	Arvada	19,078	100%	19,078
80020	Broomfield	54,201	13%	≈ 8,916
80021	Westminster	36,555	66%	≈ 27,928
80031	Westminster	35,584	10%	≈ 3,099
80033	Wheat Ridge	26,485	100%	26,485
80123	Columbine	44,549	50%	≈ 21,199
80127	Dakota Ridge	43,494	100%	43,494
80128	Columbine	36,712	90%	≈ 34,305
80135	Roxborough Park	4,141	17%	≈ 295
80212	Denver	20,746	19%	≈ 3,701
80214	Lakewood	27,022	99.0%	≈ 26,561
80215	Lakewood	19,839	100%	19,839
80226	Lakewood	31,573	99.4%	≈ 31,200
80227	Lakewood	34,907	86%	≈ 25,429
80228	Lakewood	34,942	100%	34,942
80232	Lakewood	23,050	99.1%	≈ 22,786
80235	Denver	8,373	75%	≈ 5,351
80401	Golden	43,811	100%	43,811
80403	Coal Creek	20,732	82%	≈ 19,522
80419	Golden	0	100%	0
80421	—	8,536	2.1%	≈ 90
80425	—	243	100%	243
80433	Aspen Park	8,292	100%	8,292
80439	Evergreen	24,610	42%	≈ 21,749
80453	Idledale	297	100%	297
80454	Indian Hills	986	100%	986
80457	Kittredge	283	100%	283
80465	Dakota Ridge	16,582	100%	16,582
80470	—	3,608	81%	≈ 2,029

They also touch the county with under 1% of their land, so they aren’t counted: 80125.

ZIP codes shared with other counties

These 15 ZIP codes have part of their land in another county. The first figure is the share of their land in Jefferson County; then, where the rest lies.

80002 (Arvada): 96% here; 4.4% in Adams County.
80003 (Arvada): 86% here; 14% in Adams County.
80020 (Broomfield): 13% here; 60% in Broomfield County, 25% in Boulder County, and 2.2% in Adams County.
80021 (Westminster): 66% here; 34% in Broomfield County.
80031 (Westminster): 10% here; 90% in Adams County.
80123 (Columbine): 50% here; 31% in Arapahoe County and 19% in Denver County.
80128 (Columbine): 90% here; 9.9% in Arapahoe County.
80135 (Roxborough Park): 17% here; 83% in Douglas County.
80212 (Denver): 19% here; 74% in Denver County and 6.9% in Adams County.
80227 (Lakewood): 86% here; 14% in Denver County.
80235 (Denver): 75% here; 25% in Denver County.
80403 (Coal Creek): 82% here; 12% in Gilpin County and 5.5% in Boulder County.
80421: 2.1% here; 98% in Park County.
80439 (Evergreen): 42% here; 58% in Clear Creek County.
80470: 81% here; 19% in Park 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 Lakewood (6), Arvada (5), Columbine (2), Dakota Ridge (2), Denver (2), and Golden (2); 16 places in all.

They start with 4 different three-digit prefixes, one per USPS sorting center: 800, 801, 802, and 804.

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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