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/81601

81601

ZIP 81601 is in Glenwood Springs, Colorado, in Garfield County; area code 970; Mountain time. Glenwood Springs has 2 ZIP codes; the other is 81602.

Type
Standard
Time zone
America/Denver
County
Garfield
Metro area
Rifle, CO
Population
16,844
Coordinates
39.5876, -107.3387
☼ Live from 81601 — Glenwood Springs, CO

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Where 81601 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 81601
  • 🔢 Type 81601 into a pocket calculator and turn it upside down: IOgIB — not quite a word, sorry.
  • ➕ As a number, 81,601 = 13 × 6277. Its digits add up to 16, a total 1,922 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011111011000001
  • 🏠 Its numerical neighbours: 81527 (Whitewater, CO, 81 mi away) and 81602 (Glenwood Springs, CO, 3 mi away).
  • 🔄 Backwards, 81601 becomes 10618, which is not a ZIP code at all.
  • 👥 25 other ZIP codes are made of exactly the same digits (06118, 06811, 08611, 10168, 16018, 16108, …). The farthest-flung twin is 06118 in East Hartford, CT, 1,814 miles away.
  • 🧭 Farther north than 53% of all ZIP codes, and farther west than 85%.
  • 🎯466 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 81601 and you would come out at 39.59°S, 72.66°E — 685 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 58m of daylight. Shortest: 9h 22m.
  • 📏 At 367.6 square miles of land, 81601 is bigger than 96% of ZIP codes — room for about 279 Central Parks.
🌙 The sky over 81601 today
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🌋 Shake report
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Source: USGS.

People and housing

Population16,844This ZIP16,844
Households6,296This ZIP6,296
Housing units6,860This ZIP6,860
Median age39.1This ZIP39.1Colorado37.7US 38.9
Median household income$109,129This ZIP$109,129Colorado$95,470US $80,734
Median home value$798,900This ZIP$798,900Colorado$539,400US $332,700
Median gross rent$1,877This ZIP$1,877Colorado$1,761US $1,413
Bachelor's degree or higher40.2%This ZIP40.2%
Mean commute28.4 minThis ZIP28.4 min
Population density45.8 / sq miThis ZIP45.8 / sq mi

Business and tax activity

Business establishments1,017This ZIP1,017
Employees9,778This ZIP9,778
Annual payroll$590,176,000This ZIP$590,176,000
Tax returns filed8,150This ZIP8,150
Total adjusted gross income$839,848,000This ZIP$839,848,000

Land area

Land area367.63 sq miThis ZIP367.63 sq mi
Water area0.85 sq miThis ZIP0.85 sq mi

Other place names in 81601

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

ZIP codes near 81601

ZIPCityDistance
81602 Glenwood Springs, CO 2.7 mi
81647 New Castle, CO 10.4 mi
81637 Gypsum, CO 18.1 mi
81652 Silt, CO 19.7 mi
81623 Carbondale, CO 25.4 mi
80426 Burns, CO 27.2 mi
81621 Basalt, CO 28.6 mi
81631 Eagle, CO 30.3 mi
81654 Snowmass, CO 30.7 mi
81615 Snowmass Village, CO 33.4 mi

Find every ZIP code within 10 miles of 81601 →

Questions about this ZIP code

Where is ZIP code 81601?

81601 is in Glenwood Springs, Colorado, in Garfield County, part of the Rifle, CO micropolitan area. Its published point location is 39.5876, -107.3387.

What county is 81601 in?

81601 lies in Garfield County.

What area code is 81601?

Glenwood Springs uses area code 970, from NANPA's telephone records.

What time zone is 81601 in?

81601 uses America/Denver.

How many people live in 81601?

About 16,844 people live in ZIP code 81601, in 6,296 households, at 45.8 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 81601?

$109,129 a year, against $95,470 across Colorado.

What ZIP codes are near 81601?

The closest are 81602 (2.7 mi), 81647 (10.4 mi), 81637 (18.1 mi), 81652 (19.7 mi) and 81623 (25.4 mi).

Is 81601 a PO Box ZIP code?

81601 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “81601 ZIP Code — Glenwood Springs, Colorado (Garfield County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/81601

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