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/EUREKA

Eureka ZIP codes, California

Eureka, CA has 3 ZIP codes (95503, 95501 and 95502) and area codes 707 and 369. The largest is 95503.

USPS city name
3 ZIP codes
Overlapping the city
3 more
Population
26,010
Area codes
707, 369

Mail addressed to Eureka uses the ZIP codes above. 3 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.

Eureka in numbers

About 26,010 people live in Eureka, in 10,392 households. The median household income is $57,662 a year, 42% below the California median of $99,122 (US: $80,734). The median owner-occupied home is valued at $404,500 (45% below the California median), and median gross rent is $1,195 a month. The median age is 39.1; 29.0% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 16 minutes.

Population26,010Eureka26,010
Households10,392Eureka10,392
Median age39.1Eureka39.1California37.9US 38.9
Median household income$57,662Eureka$57,662California$99,122US $80,734
Median home value$404,500Eureka$404,500California$734,700US $332,700
Median gross rent$1,195Eureka$1,195California$2,036US $1,413
Bachelor's degree or higher29.0%Eureka29.0%California37.1%US 35.7%
Mean commute15.8 minEureka15.8 minCalifornia28.7 minUS 26.4 min
Population density2,719 / sq miEureka2,719 / sq mi

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

ZIP codes addressed as Eureka

ZIP codes with the USPS city name Eureka
ZIP City Type Population Median income Median home
95503 Eureka , CA Standard 25,054 $71,855 $444,700
95501 Eureka , CA Standard 22,890 $54,137 $412,300
95502 Eureka , CA No street area — — —

Other ZIP codes overlapping Eureka

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

ZIP codes overlapping Eureka
ZIP City Type Population Median income Median home
95521 Arcata , CA Standard 21,980 $53,114 $501,000
95524 Bayside , CA Standard 1,634 $87,500 $601,600
95537 Fields Landing , CA Standard 532 $78,686 $435,500

Map of Eureka ZIP codes

955039550195502

The ZIP codes of Eureka, 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 Eureka

The nearest larger town is Redding (93,409 people, 95 mi).

Towns near Eureka
TownPopulationDistance
Myrtletown 5,322 1.4 mi
Cutten 3,550 2.3 mi
Bayview 2,803 2.6 mi
Pine Hills 2,875 4.5 mi
Humboldt Hill 3,551 5.7 mi
Arcata 18,607 6.1 mi
McKinleyville 17,113 11.4 mi
Fortuna 12,326 14.6 mi
Rio Dell 3,349 21.0 mi

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

Cite this page

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

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