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/CA/KELSEYVILLE

Kelseyville ZIP code, California

The ZIP code for Kelseyville, CA is 95451, and its area code is 707.

USPS city name
1 ZIP code
Population
4,011
Area code
707

Kelseyville in numbers

About 4,011 people live in Kelseyville, in 1,485 households. The median household income is $45,663 a year, 54% below the California median of $99,122 (US: $80,734). Median gross rent is $1,132 a month. The median age is 33.1; 6.3% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 29 minutes.

Population4,011Kelseyville4,011
Households1,485Kelseyville1,485
Median age33.1Kelseyville33.1California37.9US 38.9
Median household income$45,663Kelseyville$45,663California$99,122US $80,734
Median gross rent$1,132Kelseyville$1,132California$2,036US $1,413
Bachelor's degree or higher6.3%Kelseyville6.3%California37.1%US 35.7%
Mean commute28.6 minKelseyville28.6 minCalifornia28.7 minUS 26.4 min
Population density1,390 / sq miKelseyville1,390 / sq mi

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

ZIP codes addressed as Kelseyville

ZIP codes with the USPS city name Kelseyville
ZIP City Type Population Median income Median home
95451 Kelseyville , CA Standard 12,592 $62,568 $352,000

Map of Kelseyville ZIP codes

95451

The ZIP codes of Kelseyville, CA, 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 Kelseyville

The nearest larger towns are Clearlake Riviera (4,122 people, 6.0 mi), Lakeport (5,113 people, 6.8 mi) and Clearlake (16,659 people, 11 mi).

Towns near Kelseyville
TownPopulationDistance
Clearlake Riviera 4,122 6.0 mi
Lakeport 5,113 6.8 mi
Lucerne 3,435 6.8 mi
North Lakeport 2,995 9.1 mi
Clearlake 16,659 10.7 mi
Nice 2,569 10.9 mi
Cloverdale 8,886 15.6 mi
Hidden Valley Lake 5,872 19.0 mi
Ukiah 16,304 23.5 mi
Healdsburg 11,243 24.1 mi
Windsor 26,081 29.6 mi

More nearby: every ZIP code in Lake County · California ZIP codes

Cite this page

zipcodes.pro. “Kelseyville, CA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ca/kelseyville

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