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 — STATE/CO/COUNTY/LAKE

Lake County, CO ZIP codes

Lake County, CO has 3 ZIP codes, in 3 towns: 80461, 81251 and 80429.

The county seat is Leadville.

ZIP codes
3
Towns
3
County seat
Leadville
County FIPS
08065
Population
7,380
Median household income
$96,575
Land area
377 sq mi
Metro area
Breckenridge

Lake County ZIP codes by town

Leadville (county seat)
80461

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Lake County ZIP codes

804298046181251

The ZIP codes of Lake County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Lake County in numbers

About 7,380 people live in Lake County, in 3,020 households, the 42nd most populous of Colorado's 64 counties. The median household income is $96,575 a year, about the same as the Colorado median of $95,470 (US: $80,734). The median owner-occupied home is valued at $466,100 (14% below the Colorado median), and median gross rent is $1,397 a month. The median age is 37.3; 49.5% of adults 25 and over hold a bachelor's degree or higher (45.7% across Colorado); the average commute takes 26 minutes.

Population7,380Lake7,380
Households3,020Lake3,020
Median age37.3Lake37.3Colorado37.7US 38.9
Median household income$96,575Lake$96,575Colorado$95,470US $80,734
Median home value$466,100Lake$466,100Colorado$539,400US $332,700
Median gross rent$1,397Lake$1,397Colorado$1,761US $1,413
Bachelor's degree or higher49.5%Lake49.5%Colorado45.7%US 35.7%
Mean commute25.7 minLake25.7 minColorado25.2 minUS 26.4 min
Population density20 / sq miLake20 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Lake County

Largest towns in Lake County
TownZIP codesPopulation
Twin Lakes 1 8,030
Leadville 1 2,620

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Not sure you are in Lake County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Lake County, with figures

ZIP codes in Lake County
ZIP City Type Population Median income Median home
80429 Climax , CO No street area — — —
80461 Leadville , CO Standard 6,957 $95,775 $458,400
81251 Twin Lakes , CO Standard 423 $105,600 $672,600

Cite this page

zipcodes.pro. “Lake County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/co/county/lake

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