What city is 80031 in?

80031 is a Westminster, CO mailing address. By land area, 91% lies inside Westminster and 8% lies inside Shaw Heights.

What is the population of 80031?

About 35,584 people (±1,387), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 37,254.

What is the median household income in 80031?

$107,422 (±$6,426), compared with $95,470 for Colorado as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 80031?

24 USPS carrier routes with 15,791 residential and 645 business mailboxes (16,437 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 80031?

The closest, measured center to center: 80260 (2 mi, Thornton), 80030 (3 mi, Westminster), 80234 (3.1 mi, Westminster), 80003 (3.6 mi, Arvada), 80021 (4.1 mi, Westminster) and 80221 (4.3 mi, Berkley).

80031 ZIP Code, Westminster, CO

Q: What county is 80031 in?

80031 is mostly in Adams County (90% of its land), with smaller parts in Jefferson County.

80031 is a ZIP code in Westminster, Colorado — mostly in Adams County (90% of its land), with smaller parts in Jefferson County. It covers 8.4 square miles of land. The closest ZIP codes are 80260, 80030 and 80234. 35,584 people live here in 14,529 households. At about 4,222 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (70% own). Median household income is $107,422, above the Colorado median of $95,470.

Quick facts

Mailing city: Westminster, CO
County: Adams County
Land area: 8.4 sq mi
Population: 35,584
Median household income: $107,422
Carrier routes: 24 (15,791 homes)

Key figures

Measure	Value
Residents	35,584
Households	14,529
Median household income	$107,422
Income per person	$56,568
Median age	39.5
Homeowners	69.7%
Median home value	$535,300
Median rent	$1,994
Bachelor's degree or higher	45.1%
Average commute (minutes)	27.7
Households with kids under 18	25.1%
Moved in the past year	13.2%
Below the poverty line	7.8%
Broadband internet	94.0%
Speak a non-English language at home	17.7%

Household income

% of households	Value
<$10K	2.8%
$10–15K	2.5%
$15–25K	3.2%
$25–35K	3.4%
$35–50K	8.0%
$50–75K	12.9%
$75–100K	13.7%
$100–150K	20.7%
$150–200K	12.2%
$200K+	20.5%

Age

% of all residents	Value
<10	9.9%
10–19	11.6%
20–24	3.8%
25–34	17.5%
35–44	15.7%
45–54	11.9%
55–64	12.6%
65–74	9.4%
75+	7.6%

Tenure

% of housing units	Value
Owned, with mortgage	49.1%
Owned outright	17.5%
Rented	28.6%
Vacant	4.8%

Type of building

% of housing units	Value
Detached house	60.2%
Townhome	14.8%
2–4 units	3.4%
5–19 units	10.4%
20+ units	11.1%
Mobile / other	0.2%

Businesses in 80031

770 business establishments with 7,972 employees (ZIP Codes Business Patterns 2023).

Professional, Scientific, and Technical Services: 130
Health Care and Social Assistance: 97
Construction: 72
Other Services (except Public Administration): 71
Finance and Insurance: 68
Accommodation and Food Services: 63
Retail Trade: 60
Real Estate and Rental and Leasing: 56

EDDM carrier routes

80031 has 24 USPS carrier routes with 15,791 residential and 645 business mailboxes. Open the EDDM route map.

Carrier routes in 80031

80031 has 24 USPS carrier routes (24 city (C)) with 15,791 residential and 645 business mailboxes. Routes range from 156 homes (C046) to 1,202 homes (C025); the median route has 602 homes. The Census counted 14,529 households in 80031 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	2
250–499	4
500–749	10
750–999	5
1,000–1,499	3
1,500+	0

Best routes in 80031 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

Route C021 — USPS business mailboxes 246, 1,062 homes
Route C029 — USPS business mailboxes 137, 223 homes
Route C025 — USPS business mailboxes 76, 1,202 homes
Route C006 — USPS business mailboxes 75, 641 homes
Route C043 — USPS business mailboxes 32, 1,052 homes

Select these 5 routes on the route map

Every carrier route in 80031

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C005	City	553	18	$82,459	—	—	—
C006	City	641	75	$44,560	—	—	—
C009	City	468	2	$70,323	—	—	—
C012	City	575	2	$111,079	—	—	—
C016	City	537	4	$108,341	—	—	—
C018	City	510	13	$70,323	—	—	—
C021	City	1,062	246	$75,346	—	—	—
C025	City	1,202	76	$110,937	—	—	—
C026	City	475	1	$111,079	—	—	—
C027	City	563	0	$156,724	—	—	—
C029	City	223	137	$108,341	—	—	—
C030	City	492	0	$96,710	—	—	—
C031	City	950	4	$98,616	—	—	—
C032	City	684	14	$195,054	—	—	—
C033	City	862	1	$106,428	—	—	—
C035	City	489	0	$181,448	—	—	—
C036	City	791	1	$135,449	—	—	—
C037	City	742	7	$157,104	—	—	—
C038	City	782	3	$96,710	—	—	—
C040	City	629	6	$131,391	—	—	—
C041	City	557	1	$156,724	—	—	—
C042	City	796	1	$119,845	—	—	—
C043	City	1,052	32	$157,104	—	—	—
C046	City	156	1	$109,124	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 80031 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

80260 — Thornton city, CO (2 mi)
80030 — Westminster city, CO (3 mi)
80234 — Westminster city, CO (3.1 mi)
80003 — Arvada city, CO (3.6 mi)
80021 — Westminster city, CO (4.1 mi)
80221 — Berkley CDP, CO (4.3 mi)
80020 — Broomfield city, CO (4.4 mi)
80229 — Thornton city, CO (4.5 mi)

Areas that include 80031

Westminster, CO ZIP codes — 7 ZIP codes
Shaw Heights, CO ZIP codes — 1 ZIP code
Adams County ZIP codes — 30 ZIP codes
Jefferson County ZIP codes — 32 ZIP codes
Colorado ZIP code data

Where it ranks

Mail every home in 80031

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 80031, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 80031 in?: 80031 is a Westminster, CO mailing address. By land area, 91% lies inside Westminster and 8% lies inside Shaw Heights.
What county is 80031 in?: 80031 is mostly in Adams County (90% of its land), with smaller parts in Jefferson County.
What is the population of 80031?: About 35,584 people (±1,387), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 37,254.
What is the median household income in 80031?: $107,422 (±$6,426), compared with $95,470 for Colorado as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 80031?: 24 USPS carrier routes with 15,791 residential and 645 business mailboxes (16,437 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 80031?: The closest, measured center to center: 80260 (2 mi, Thornton), 80030 (3 mi, Westminster), 80234 (3.1 mi, Westminster), 80003 (3.6 mi, Arvada), 80021 (4.1 mi, Westminster) and 80221 (4.3 mi, Berkley).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.