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/CA/COUNTY/ALPINE

Alpine County, CA ZIP codes

Alpine County, CA has 3 ZIP codes, in 3 towns: 95223, 96120 and 95646.

The county seat is Markleeville.

ZIP codes
3
Towns
3
County seat
Markleeville
County FIPS
06003
Population
1,616
Median household income
$105,521
Land area
738 sq mi

Alpine County ZIP codes by town

Markleeville (county seat)
96120

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 Alpine County ZIP codes

952239564696120

The ZIP codes of Alpine 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.

Alpine County in numbers

About 1,616 people live in Alpine County, in 435 households, the 58th most populous of California's 58 counties. The median household income is $105,521 a year, 6% above the California median of $99,122 (US: $80,734). The median owner-occupied home is valued at $590,200 (20% below the California median). The median age is 39.8; 41.1% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 33 minutes.

Population1,616Alpine1,616
Households435Alpine435
Median age39.8Alpine39.8California37.9US 38.9
Median household income$105,521Alpine$105,521California$99,122US $80,734
Median home value$590,200Alpine$590,200California$734,700US $332,700
Bachelor's degree or higher41.1%Alpine41.1%California37.1%US 35.7%
Mean commute32.7 minAlpine32.7 minCalifornia28.7 minUS 26.4 min
Population density2 / sq miAlpine2 / 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 Alpine County

Largest towns in Alpine County
TownZIP codesPopulation
Arnold 1 2,482
Kirkwood 1 218
Markleeville 1 110

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.

Neighbouring counties

Counties that share a ZIP code with Alpine County.

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

Every ZIP code in Alpine County, with figures

ZIP codes in Alpine County
ZIP City Type Population Median income Median home
95223 Arnold , CA Standard 3,056 $106,694 $476,000
95646 Kirkwood , CA Standard 218 — $783,300
96120 Markleeville , CA Standard 1,349 $100,417 $603,100

Cite this page

zipcodes.pro. “Alpine County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ca/county/alpine

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