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/80643

80643

ZIP 80643 is Keenesburg, Colorado, mostly in Weld County; area codes 720, 303 and 983; Mountain time.

Type
Standard
Time zone
America/Denver
County
Weld +1 more
Metro area
Greeley, CO
Population
5,119
Coordinates
40.1129, -104.4892
☼ Live from 80643 — Keenesburg, CO

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 80643 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 80643
  • 🔢 Type 80643 into a pocket calculator and turn it upside down: EhgOB — not quite a word, sorry.
  • ➕ As a number, 80,643 = 3 × 26881. Its digits add up to 21, a total 2,594 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011101100000011
  • 🏠 Its numerical neighbours: 80642 (Hudson, CO, 8 mi away) and 80644 (Kersey, CO, 16 mi away).
  • 🔄 Backwards, 80643 becomes 34608 — and that is a real ZIP code: Spring Hill, FL, 1,481 miles away.
  • 👥 60 other ZIP codes are made of exactly the same digits (03468, 03846, 03864, 04683, 04863, 06384, …). The farthest-flung twin is 04683 in Sunset, ME, 1,834 miles away.
  • 🧭 Farther north than 58% of all ZIP codes, and farther west than 82%.
  • 🎯313 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 80643 and you would come out at 40.11°S, 75.51°E — 689 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 02m of daylight. Shortest: 9h 19m.
  • 📏 At 216.5 square miles of land, 80643 is bigger than 92% of ZIP codes — room for about 164 Central Parks.
🌙 The sky over 80643 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population5,119This ZIP5,119
Households1,798This ZIP1,798
Housing units1,824This ZIP1,824
Median age36.3This ZIP36.3Colorado37.7US 38.9
Median household income$97,766This ZIP$97,766Colorado$95,470US $80,734
Median home value$474,900This ZIP$474,900Colorado$539,400US $332,700
Median gross rent$1,728This ZIP$1,728Colorado$1,761US $1,413
Bachelor's degree or higher15.6%This ZIP15.6%
Mean commute32.3 minThis ZIP32.3 min
Population density23.6 / sq miThis ZIP23.6 / sq mi

Business and tax activity

Business establishments96This ZIP96
Employees832This ZIP832
Annual payroll$68,462,000This ZIP$68,462,000
Tax returns filed2,260This ZIP2,260
Total adjusted gross income$192,090,000This ZIP$192,090,000

Land area

Land area216.48 sq miThis ZIP216.48 sq mi
Water area1.31 sq miThis ZIP1.31 sq mi

Counties 80643 spans

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

CountyShare of this ZIP
Weld County 88.6%
Adams County 11.4%

Other place names in 80643

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

ZIP codes near 80643

ZIPCityDistance
80642 Hudson, CO 7.8 mi
80652 Roggen, CO 11.4 mi
80603 Brighton, CO 14.4 mi
80645 La Salle, CO 14.5 mi
80644 Kersey, CO 15.6 mi
80621 Fort Lupton, CO 16.5 mi
80651 Platteville, CO 19.3 mi
80623 Gilcrest, CO 19.5 mi
80601 Brighton, CO 19.8 mi
80249 Denver, CO 20.9 mi

Find every ZIP code within 10 miles of 80643 →

Questions about this ZIP code

Where is ZIP code 80643?

80643 is in Keenesburg, Colorado, in Weld County, part of the Greeley, CO metropolitan area. Its published point location is 40.1129, -104.4892.

What county is 80643 in?

80643 spans 2 counties: Weld County and Adams County. Most of it falls in Weld 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 80643?

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

What time zone is 80643 in?

80643 uses America/Denver.

How many people live in 80643?

About 5,119 people live in ZIP code 80643, in 1,798 households, at 23.6 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 80643?

$97,766 a year, against $95,470 across Colorado.

What ZIP codes are near 80643?

The closest are 80642 (7.8 mi), 80652 (11.4 mi), 80603 (14.4 mi), 80645 (14.5 mi) and 80644 (15.6 mi).

Is 80643 a PO Box ZIP code?

80643 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “80643 ZIP Code — Keenesburg, Colorado (Weld County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/80643

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/80643.json

Underlying data is public domain or openly licensed — sources, vintages and licences.