Zip Code 95503
Eureka, California — Humboldt County
📍 ZIP code 95503 is in Eureka, Humboldt County, California.
ZIP code 95503 is located in Eureka, Humboldt County, California. It is a zip code in the Pacific (PST/PDT) Time Zone with an estimated population of 24,442. The area code for ZIP code 95503 is 530.
Quick Answer
Zip code 95503 is in Eureka, California (Humboldt County). It has a population of 24,442, median household income of $76,708, and median home value of $411,500.
Population
24,442
Income
$76,708
Home Value
$411,500
Climate
63°F / 41°F
About Zip Code 95503
Zip code 95503 is located in Eureka, California, within Humboldt County. Home to approximately 24,442 residents, this area sits at an elevation of 524 ft and falls within the Pacific (PST/PDT) timezone. The local area code is 530.
The median household income is $76,708 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $411,500, and the cost of living index is 118 (18% above the national average of 100).
Summers average a high of 63°F while winters drop to 41°F. The area receives about 40 in of rain annually. The zip code covers 86.4 square miles of land area and 3.2 square miles of water.
Key Statistics
24,442
$76,708
$411,500
Pacific (PST/PDT)
530
524 ft
86.4 sq mi
44.1
10,738
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Compare With Nearby Zip Codes
| Metric | 95503 | 95501 | 95537 | 95564 | 95524 | 95551 |
|---|---|---|---|---|---|---|
| City | Eureka, CA | Eureka, CA | Fields Landing, CA | Arcata, CA | Bayside, CA | Loleta, CA |
| Population | 24,442 | 22,972 | 512 | 477 | 1,770 | 1,870 |
| Median Income | $76,708 | $55,076 | $76,116 | $69,250 | $82,697 | $73,472 |
| Home Value | $411,500 | $389,900 | $360,300 | $421,900 | $585,100 | $469,800 |
| Cost of Living | 118 | 105 | 89 | 116 | 161 | 146 |
| Median Age | 44.1 | 39.5 | 26 | 41.6 | 46.1 | 35.6 |
Cost of Living
100 = National Average. Eureka's cost of living is 18% above the national average.
vs. State Avg
Above
Affordability
Moderate
Income-to-Home
5.4x
Demographics
Zip code 95503 has a population of 24,442 people with a median age of 44.1. There are 10,738 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Eureka (95503) population trend from 2010 to 2024
↑ 201.1%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
63°F
41°F
40 in
0 in
Eureka experiences mild summers with average highs around 63°F. Winters are mild with lows averaging 41°F. The area receives virtually no snowfall.
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Housing & Economy
Median Home Value
$411,500
Median Household Income
$76,708
With 10,738 housing units across 86.4 square miles, 95503 has a housing density of 124 units per square mile. The home price-to-income ratio is 5.4x.
Location & Geography
Latitude
40.7384°
Longitude
-124.1078°
Land Area
86.4 sq mi
Water Area
3.2 sq mi
Nearby Zip Codes
Zip codes closest to 95503 (Eureka, CA) with distances:
All Zip Codes in Eureka, CA
Other zip codes serving Eureka:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 95503's $76,708. A way to compare Eureka to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 95503 (Eureka, CA). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Eureka, California?
Eureka, California uses zip code 95503 along with 2 other zip codes.
What county is zip code 95503 in?
Zip code 95503 is located in Humboldt County, California.
What is the population of zip code 95503?
The population of zip code 95503 is 24,442 with a median age of 44.1.
Is 95503 in Eureka, California?
Yes, zip code 95503 is in Eureka, Humboldt County, California. The area code is 530.
Frequently Asked Questions
What city is zip code 95503 in?
Zip code 95503 is in Eureka, California. It is part of Humboldt County and uses the Pacific (PST/PDT) timezone.
What is zip code 95503?
Zip code 95503 is a U.S. postal code in Eureka, California (Humboldt County). It has a population of 24,442 and covers 86.4 square miles.
What is the population of zip code 95503?
The population of zip code 95503 (Eureka, CA) is 24,442 with a median age of 44.1. There are approximately 10,738 housing units in this area.
What is the median income in zip code 95503?
The median household income in zip code 95503 (Eureka, CA) is $76,708 per year. The cost of living index is 118 (100 = national average).
What is the average home price in zip code 95503?
The median home value in zip code 95503 (Eureka, CA) is $411,500. The cost of living index is 118 compared to the national average of 100.
What county is zip code 95503 in?
Zip code 95503 is located in Humboldt County, California. The primary city is Eureka.
What is the area code for zip code 95503?
Zip code 95503 in Eureka, CA uses area code 530. It is located in the Pacific (PST/PDT) timezone.
Is zip code 95503 a good place to live?
Zip code 95503 (Eureka, CA) has a cost of living index of 118 (100 = national average), a median household income of $76,708, and median home values of $411,500. The median age is 44.1. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 95503?
The cost of living index for zip code 95503 (Eureka, CA) is 118, where 100 represents the national average. This area is above the national average. Median home value: $411,500.
What schools serve zip code 95503?
Zip code 95503 in Eureka, California is served by the local school district of Humboldt County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.