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/80310

80310

ZIP 80310 is in Boulder, Colorado, in Boulder County; area codes 720, 303 and 983; Mountain time. Boulder has 11 ZIP codes in all.

Type
Standard
Time zone
America/Denver
County
Boulder
Metro area
Boulder, CO
Population
7,692
Coordinates
40.0040, -105.2614
☼ Live from 80310 — Boulder, CO

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Local time: —

Where 80310 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 80310
  • 🔢 Type 80310 into a pocket calculator and turn it upside down: OIEOB — not quite a word, sorry.
  • ➕ As a number, 80,310 = 2 × 3 × 5 × 2677. Its digits add up to 12, a total 940 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011100110110110
  • 🏠 Its numerical neighbours: 80309 (Boulder, CO, 1 mi away) and 80314 (Boulder, CO, 8 mi away).
  • 🔄 Backwards, 80310 becomes 01308, which is not a ZIP code at all.
  • 👥 34 other ZIP codes are made of exactly the same digits (00831, 01038, 01083, 01380, 01803, 01830, …). The farthest-flung twin is 00831 in St John, VI, 2,829 miles away.
  • 🧭 Farther north than 57% of all ZIP codes, and farther west than 83%.
  • 🎯354 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 80310 and you would come out at 40.00°S, 74.74°E — 682 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 01m of daylight. Shortest: 9h 19m.
  • 📏 At 0.545 square miles of land, 80310 is bigger than 6% of ZIP codes — about 264 football fields.
🌙 The sky over 80310 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population7,692This ZIP7,692
Households2This ZIP2
Housing units2This ZIP2
Median age19.3This ZIP19.3Colorado37.7US 38.9
Bachelor's degree or higher72.5%This ZIP72.5%
Mean commute15.9 minThis ZIP15.9 min
Population density14,113.8 / sq miThis ZIP14,113.8 / sq mi

Business and tax activity

Business establishments7This ZIP7
Employees54This ZIP54
Annual payroll$2,382,000This ZIP$2,382,000

Land area

Land area0.55 sq miThis ZIP0.55 sq mi
Water area0.00 sq miThis ZIP0.00 sq mi

Other place names in 80310

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

ZIP codes near 80310

ZIPCityDistance
80309 Boulder, CO 0.9 mi
80305 Boulder, CO 2.0 mi
80304 Boulder, CO 3.2 mi
80303 Boulder, CO 3.5 mi
80301 Boulder, CO 4.3 mi
80302 Boulder, CO 4.8 mi
80025 Eldorado Springs, CO 5.8 mi
80027 Louisville, CO 6.6 mi
80308 Boulder, CO 6.8 mi
80307 Boulder, CO 8.3 mi

Find every ZIP code within 10 miles of 80310 →

Questions about this ZIP code

Where is ZIP code 80310?

80310 is in Boulder, Colorado, in Boulder County, part of the Boulder, CO metropolitan area. Its published point location is 40.0040, -105.2614.

What county is 80310 in?

80310 lies in Boulder County.

What area code is 80310?

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

What time zone is 80310 in?

80310 uses America/Denver.

How many people live in 80310?

About 7,692 people live in ZIP code 80310, in 2 households, at 14,113.8 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What ZIP codes are near 80310?

The closest are 80309 (0.9 mi), 80305 (2 mi), 80304 (3.2 mi), 80303 (3.5 mi) and 80301 (4.3 mi).

Is 80310 a PO Box ZIP code?

80310 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “80310 ZIP Code — Boulder, Colorado (Boulder County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/80310

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