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/80027

80027

ZIP 80027 is Louisville, Colorado, in Boulder County; area codes 303, 720 and 983; Mountain time.

Type
Standard
Time zone
America/Denver
County
Boulder
Metro area
Boulder, CO
Population
34,127
Coordinates
39.9515, -105.1581
☼ Live from 80027 — Louisville, CO

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 80027 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 80027
  • 🔢 Type 80027 into a pocket calculator and turn it upside down: LZOOB — not quite a word, sorry.
  • ➕ As a number, 80,027 = 79 × 1013. Its digits add up to 17, a total 2,133 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011100010011011
  • 🏠 Its numerical neighbours: 80026 (Lafayette, CO, 5 mi away) and 80030 (Westminster, CO, 11 mi away).
  • 🔄 Backwards, 80027 becomes 72008, which is not a ZIP code at all.
  • 👥 28 other ZIP codes are made of exactly the same digits (00728, 00782, 02780, 02807, 07028, 07082, …). The farthest-flung twin is 00782 in Comerio, PR, 2,756 miles away.
  • 🧭 Farther north than 56% of all ZIP codes, and farther west than 83%.
  • 🎯349 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 80027 and you would come out at 39.95°S, 74.84°E — 688 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 20m.
  • 📏 At 18.6 square miles of land, 80027 is bigger than 36% of ZIP codes — room for about 14 Central Parks.
🌙 The sky over 80027 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population34,127This ZIP34,127
Households13,180This ZIP13,180
Housing units13,787This ZIP13,787
Median age40.3This ZIP40.3Colorado37.7US 38.9
Median household income$154,232This ZIP$154,232Colorado$95,470US $80,734
Median home value$890,200This ZIP$890,200Colorado$539,400US $332,700
Median gross rent$2,334This ZIP$2,334Colorado$1,761US $1,413
Bachelor's degree or higher73.4%This ZIP73.4%
Mean commute22.4 minThis ZIP22.4 min
Population density1,832.0 / sq miThis ZIP1,832.0 / sq mi

Business and tax activity

Business establishments1,425This ZIP1,425
Employees22,588This ZIP22,588
Annual payroll$1,873,343,000This ZIP$1,873,343,000
Tax returns filed16,580This ZIP16,580
Total adjusted gross income$2,540,914,000This ZIP$2,540,914,000

Land area

Land area18.63 sq miThis ZIP18.63 sq mi
Water area0.19 sq miThis ZIP0.19 sq mi

Other place names in 80027

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

ZIP codes near 80027

ZIPCityDistance
80303 Boulder, CO 3.1 mi
80038 Broomfield, CO 4.3 mi
80020 Broomfield, CO 4.7 mi
80021 Broomfield, CO 4.8 mi
80305 Boulder, CO 5.1 mi
80026 Lafayette, CO 5.2 mi
80007 Arvada, CO 6.2 mi
80310 Boulder, CO 6.6 mi
80301 Boulder, CO 6.9 mi
80005 Arvada, CO 7.0 mi

Find every ZIP code within 10 miles of 80027 →

Questions about this ZIP code

Where is ZIP code 80027?

80027 is in Louisville, Colorado, in Boulder County, part of the Boulder, CO metropolitan area. Its published point location is 39.9515, -105.1581.

What county is 80027 in?

80027 lies in Boulder County.

What area code is 80027?

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

What time zone is 80027 in?

80027 uses America/Denver.

How many people live in 80027?

About 34,127 people live in ZIP code 80027, in 13,180 households, at 1,832.0 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 80027?

$154,232 a year, against $95,470 across Colorado.

What ZIP codes are near 80027?

The closest are 80303 (3.1 mi), 80038 (4.3 mi), 80020 (4.7 mi), 80021 (4.8 mi) and 80305 (5.1 mi).

Is 80027 a PO Box ZIP code?

80027 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “80027 ZIP Code — Louisville, Colorado (Boulder County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/80027

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/80027.json

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