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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/80420

80420

ZIP 80420 is Alma, Colorado, in Park County; Mountain time.

Type
Standard
Time zone
America/Denver
County
Park
Population
1,246
Coordinates
39.3244, -106.1161
☼ Live from 80420 — Alma, CO

Weather right now

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NEXRAD radar
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Local time: —

Where 80420 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 80420
  • 🔢 Type 80420 into a pocket calculator and turn it upside down: OZhOB — not quite a word, sorry.
  • ➕ As a number, 80,420 = 2 × 2 × 5 × 4021. Its digits add up to 14, a total 1,416 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011101000100100
  • 🏠 Its numerical neighbours: 80419 (Golden, CO, 56 mi away) and 80421 (Bailey, CO, 34 mi away).
  • 🔄 Backwards, 80420 becomes 02408, which is not a ZIP code at all.
  • 👥 24 other ZIP codes are made of exactly the same digits (00824, 02048, 02804, 02840, 04028, 04082, …). The farthest-flung twin is 00824 in Christiansted, VI, 2,888 miles away.
  • 🧭 Farther north than 51% of all ZIP codes, and farther west than 84%.
  • 🎯403 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 80420 and you would come out at 39.32°S, 73.88°E — 716 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 57m of daylight. Shortest: 9h 24m.
  • 📏 At 42.0 square miles of land, 80420 is bigger than 55% of ZIP codes — room for about 32 Central Parks.
🌙 The sky over 80420 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population1,246This ZIP1,246
Households741This ZIP741
Housing units1,161This ZIP1,161
Median age57.2This ZIP57.2Colorado37.7US 38.9
Median household income$86,705This ZIP$86,705Colorado$95,470US $80,734
Median home value$616,000This ZIP$616,000Colorado$539,400US $332,700
Median gross rent$2,295This ZIP$2,295Colorado$1,761US $1,413
Bachelor's degree or higher68.9%This ZIP68.9%
Mean commute30.8 minThis ZIP30.8 min
Population density29.6 / sq miThis ZIP29.6 / sq mi

Business and tax activity

Business establishments60This ZIP60
Employees174This ZIP174
Annual payroll$6,220,000This ZIP$6,220,000

Land area

Land area42.02 sq miThis ZIP42.02 sq mi
Water area0.30 sq miThis ZIP0.30 sq mi

Other place names in 80420

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

ZIP codes near 80420

ZIPCityDistance
80461 Leadville, CO 10.8 mi
80424 Breckenridge, CO 11.9 mi
80429 Climax, CO 12.5 mi
80443 Frisco, CO 12.7 mi
80440 Fairplay, CO 13.7 mi
81649 Red Cliff, CO 14.5 mi
80432 Como, CO 16.3 mi
80448 Grant, CO 18.4 mi
80435 Dillon, CO 19.8 mi
81645 Minturn, CO 20.4 mi

Find every ZIP code within 10 miles of 80420 →

Questions about this ZIP code

Where is ZIP code 80420?

80420 is in Alma, Colorado, in Park County, part of the Denver-Aurora-Centennial, CO metropolitan area. Its published point location is 39.3244, -106.1161.

What county is 80420 in?

80420 lies in Park County.

What time zone is 80420 in?

80420 uses America/Denver.

How many people live in 80420?

About 1,246 people live in ZIP code 80420, in 741 households, at 29.6 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 80420?

$86,705 a year, against $95,470 across Colorado.

What ZIP codes are near 80420?

The closest are 80461 (10.8 mi), 80424 (11.9 mi), 80429 (12.5 mi), 80443 (12.7 mi) and 80440 (13.7 mi).

Is 80420 a PO Box ZIP code?

80420 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “80420 ZIP Code — Alma, Colorado (Park County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/80420

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