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 — CITY/CO/KEYSTONE

Keystone ZIP codes, Colorado

No ZIP code is named for Keystone, CO; addresses there use a neighbouring town's name. The ZIP code covering it is 80435. Its area code is 970.

USPS city name
0 ZIP codes
Overlapping the city
1 more
Population
1,216
Area code
970

NANPA lists no telephone rate centre for Keystone itself, so these are the area codes of the nearest one, Dillon (0.0 miles). A town on an area-code boundary can differ from its neighbour.

Keystone in numbers

About 1,216 people live in Keystone, in 641 households. The median household income is $51,591 a year, 46% below the Colorado median of $95,470 (US: $80,734). The median owner-occupied home is valued at $1,284,700 (2.4 times the Colorado median), and median gross rent is $874 a month. The median age is 28.2; 54.3% of adults 25 and over hold a bachelor's degree or higher (45.7% across Colorado); the average commute takes 17 minutes.

Population1,216Keystone1,216
Households641Keystone641
Median age28.2Keystone28.2Colorado37.7US 38.9
Median household income$51,591Keystone$51,591Colorado$95,470US $80,734
Median home value$1,284,700Keystone$1,284,700Colorado$539,400US $332,700
Median gross rent$874Keystone$874Colorado$1,761US $1,413
Bachelor's degree or higher54.3%Keystone54.3%Colorado45.7%US 35.7%
Mean commute17.0 minKeystone17.0 minColorado25.2 minUS 26.4 min
Population density29 / sq miKeystone29 / sq mi

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

ZIP codes covering Keystone

These ZIP codes cover part of Keystone but are addressed as somewhere else.

ZIP codes overlapping Keystone
ZIP City Type Population Median income Median home
80435 Dillon , CO Standard 8,715 $97,463 $941,600

Map of Keystone ZIP codes

80435

The ZIP codes of Keystone, CO, 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.

Towns near Keystone

The nearest larger towns are Breckenridge (4,959 people, 7.7 mi), Frisco (2,825 people, 8.3 mi) and Silverthorne (4,815 people, 10 mi).

Towns near Keystone
TownPopulationDistance
Breckenridge 4,959 7.7 mi
Frisco 2,825 8.3 mi
Silverthorne 4,815 10.1 mi
Vail 4,613 23.2 mi
Leadville 2,620 29.6 mi

More nearby: every ZIP code in Summit County · Colorado ZIP codes

Cite this page

zipcodes.pro. “Keystone, CO ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/co/keystone

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