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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/81251

81251

ZIP 81251 is Twin Lakes, Colorado, in Lake County; Mountain time.

Type
Standard
Time zone
America/Denver
County
Lake
Metro area
Breckenridge, CO
Population
423
Coordinates
39.1425, -106.4376
☼ Live from 81251 — Twin Lakes, CO

Weather right now

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NEXRAD radar
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Local time: —

Where 81251 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 81251
  • 🔢 Type 81251 into a pocket calculator and turn it upside down: ISZIB — not quite a word, sorry.
  • ➕ As a number, 81,251 = 31 × 2621. Its digits add up to 17, a total 2,133 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011110101100011
  • 🏠 Its numerical neighbours: 81248 (Sargents, CO, 50 mi away) and 81252 (Westcliffe, CO, 90 mi away).
  • 🔄 Backwards, 81251 becomes 15218 — and that is a real ZIP code: Pittsburgh, PA, 1,407 miles away.
  • 👥 27 other ZIP codes are made of exactly the same digits (11582, 12158, 12185, 12518, 12581, 12815, …). The farthest-flung twin is 11582 in Valley Stream, NY, 1,728 miles away.
  • 🧭 Farther north than 50% of all ZIP codes, and farther west than 84%.
  • 🎯422 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 81251 and you would come out at 39.14°S, 73.56°E — 724 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 55m of daylight. Shortest: 9h 25m.
  • 📏 At 139.2 square miles of land, 81251 is bigger than 85% of ZIP codes — room for about 106 Central Parks.
🌙 The sky over 81251 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population423This ZIP423
Households216This ZIP216
Housing units297This ZIP297
Median age71.3This ZIP71.3Colorado37.7US 38.9
Median household income$105,600This ZIP$105,600Colorado$95,470US $80,734
Median home value$672,600This ZIP$672,600Colorado$539,400US $332,700
Bachelor's degree or higher66.8%This ZIP66.8%
Mean commute44.0 minThis ZIP44.0 min
Population density3.0 / sq miThis ZIP3.0 / sq mi

Business and tax activity

Business establishments10This ZIP10
Employees27This ZIP27
Annual payroll$789,000This ZIP$789,000
Tax returns filed100This ZIP100
Total adjusted gross income$11,502,000This ZIP$11,502,000

Land area

Land area139.18 sq miThis ZIP139.18 sq mi
Water area3.73 sq miThis ZIP3.73 sq mi

Other place names in 81251

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

ZIP codes near 81251

ZIPCityDistance
80429 Climax, CO 8.9 mi
80461 Leadville, CO 10.6 mi
81228 Granite, CO 11.5 mi
81211 Buena Vista, CO 12.1 mi
81611 Aspen, CO 12.4 mi
81642 Meredith, CO 13.7 mi
80440 Fairplay, CO 20.5 mi
81656 Woody Creek, CO 21.0 mi
80420 Alma, CO 21.3 mi
81645 Minturn, CO 21.7 mi

Find every ZIP code within 10 miles of 81251 →

Questions about this ZIP code

Where is ZIP code 81251?

81251 is in Twin Lakes, Colorado, in Lake County, part of the Breckenridge, CO micropolitan area. Its published point location is 39.1425, -106.4376.

What county is 81251 in?

81251 lies in Lake County.

What time zone is 81251 in?

81251 uses America/Denver.

How many people live in 81251?

About 423 people live in ZIP code 81251, in 216 households, at 3.0 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 81251?

$105,600 a year, against $95,470 across Colorado.

What ZIP codes are near 81251?

The closest are 80429 (8.9 mi), 80461 (10.6 mi), 81228 (11.5 mi), 81211 (12.1 mi) and 81611 (12.4 mi).

Is 81251 a PO Box ZIP code?

81251 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “81251 ZIP Code — Twin Lakes, Colorado (Lake County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/81251

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