Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/80021

80021

ZIP 80021 is in Broomfield, Colorado, mostly in Jefferson County; area codes 303, 720 and 983; Mountain time. Broomfield has 4 ZIP codes; the others are 80020, 80023 and 80038.

Type
Standard
Time zone
America/Denver
County
Jefferson +1 more
Population
36,555
Coordinates
39.8907, -105.1137
☼ Live from 80021 — Broomfield, CO

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Local time: —

Where 80021 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 80021
  • 🔢 Type 80021 into a pocket calculator and turn it upside down: IZOOB — not quite a word, sorry.
  • ➕ 80021 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 11, a total 714 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011100010010101
  • 🏠 Its numerical neighbours: 80020 (Broomfield, CO, 3 mi away) and 80022 (Commerce City, CO, 17 mi away).
  • 🔄 Backwards, 80021 becomes 12008 — and that is a real ZIP code: Alplaus, NY, 1,622 miles away.
  • 👥 35 other ZIP codes are made of exactly the same digits (00821, 01028, 01082, 02018, 02081, 02108, …). The farthest-flung twin is 00821 in Christiansted, VI, 2,849 miles away.
  • 🧭 Farther north than 55% of all ZIP codes, and farther west than 83%.
  • 🎯347 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 80021 and you would come out at 39.89°S, 74.89°E — 692 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 00m of daylight. Shortest: 9h 20m.
  • 📏 At 16.5 square miles of land, 80021 is bigger than 34% of ZIP codes — room for about 13 Central Parks.
🌙 The sky over 80021 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population36,555This ZIP36,555
Households17,163This ZIP17,163
Housing units18,328This ZIP18,328
Median age36.6This ZIP36.6Colorado37.7US 38.9
Median household income$110,038This ZIP$110,038Colorado$95,470US $80,734
Median home value$568,000This ZIP$568,000Colorado$539,400US $332,700
Median gross rent$2,117This ZIP$2,117Colorado$1,761US $1,413
Bachelor's degree or higher54.8%This ZIP54.8%
Mean commute24.2 minThis ZIP24.2 min
Population density2,210.9 / sq miThis ZIP2,210.9 / sq mi

Business and tax activity

Business establishments1,362This ZIP1,362
Employees47,973This ZIP47,973
Annual payroll$4,333,302,000This ZIP$4,333,302,000
Tax returns filed20,470This ZIP20,470
Total adjusted gross income$1,778,082,000This ZIP$1,778,082,000

Land area

Land area16.53 sq miThis ZIP16.53 sq mi
Water area2.31 sq miThis ZIP2.31 sq mi

Counties 80021 spans

A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.

CountyShare of this ZIP
Jefferson County 66.5%
Broomfield County 33.5%

Other place names in 80021

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 80021

ZIPCityDistance
80038 Broomfield, CO 2.5 mi
80005 Arvada, CO 2.9 mi
80020 Broomfield, CO 3.5 mi
80031 Westminster, CO 4.1 mi
80007 Arvada, CO 4.7 mi
80027 Louisville, CO 4.8 mi
80003 Arvada, CO 5.2 mi
80004 Arvada, CO 5.3 mi
80035 Westminster, CO 5.5 mi
80036 Westminster, CO 5.5 mi

Find every ZIP code within 10 miles of 80021 →

Questions about this ZIP code

Where is ZIP code 80021?

80021 is in Broomfield, Colorado, in Jefferson County, part of the Denver-Aurora-Centennial, CO metropolitan area. Its published point location is 39.8907, -105.1137.

What county is 80021 in?

80021 spans 2 counties: Jefferson County and Broomfield County. Most of it falls in Jefferson County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.

What area code is 80021?

Broomfield uses area codes 303, 720 and 983, from NANPA's telephone records.

What time zone is 80021 in?

80021 uses America/Denver.

How many people live in 80021?

About 36,555 people live in ZIP code 80021, in 17,163 households, at 2,210.9 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 80021?

$110,038 a year, against $95,470 across Colorado.

What ZIP codes are near 80021?

The closest are 80038 (2.5 mi), 80005 (2.9 mi), 80020 (3.5 mi), 80031 (4.1 mi) and 80007 (4.7 mi).

Is 80021 a PO Box ZIP code?

80021 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “80021 ZIP Code — Broomfield, Colorado (Jefferson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/80021

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