Zip Code 90603
Whittier, California — Los Angeles County
📍 ZIP code 90603 is in Whittier, Los Angeles County, California.
ZIP code 90603 is located in Whittier, Los Angeles County, California. It is a zip code in the Pacific (PST/PDT) Time Zone with an estimated population of 20,361. The area code for ZIP code 90603 is 818.
Quick Answer
Zip code 90603 is in Whittier, California (Los Angeles County). It has a population of 20,361, median household income of $121,222, and median home value of $781,000.
Population
20,361
Income
$121,222
Home Value
$781,000
Climate
84°F / 46°F
About Zip Code 90603
Zip code 90603 is located in Whittier, California, within Los Angeles County. Home to approximately 20,361 residents, this area sits at an elevation of 285 ft and falls within the Pacific (PST/PDT) timezone. The local area code is 818.
The median household income is $121,222 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $781,000, and the cost of living index is 221 (121% above the national average of 100).
Summers average a high of 84°F while winters drop to 46°F. The area receives about 12 in of rain annually. The zip code covers 3.3 square miles of land area.
Key Statistics
20,361
$121,222
$781,000
Pacific (PST/PDT)
818
285 ft
3.3 sq mi
41.3
6,659
Advertisement
Compare With Nearby Zip Codes
| Metric | 90603 | 90604 | 90605 | 90631 | 90602 | 90638 |
|---|---|---|---|---|---|---|
| City | Whittier, CA | Whittier, CA | Whittier, CA | La Habra, CA | Whittier, CA | La Mirada, CA |
| Population | 20,361 | 39,378 | 39,224 | 68,615 | 25,823 | 45,714 |
| Median Income | $121,222 | $101,104 | $100,825 | $102,208 | $67,259 | $110,606 |
| Home Value | $781,000 | $684,400 | $662,000 | $757,900 | $729,300 | $765,100 |
| Cost of Living | 221 | 190 | 186 | 206 | 181 | 207 |
| Median Age | 41.3 | 36.2 | 37.1 | 39.2 | 34.5 | 43.7 |
Cost of Living
100 = National Average. Whittier's cost of living is 121% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
6.4x
Demographics
Zip code 90603 has a population of 20,361 people with a median age of 41.3. There are 6,659 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Whittier (90603) population trend from 2010 to 2024
↑ 58.0%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
84°F
46°F
12 in
0 in
Whittier experiences warm summers with average highs around 84°F. Winters are mild with lows averaging 46°F. The area receives virtually no snowfall.
Advertisement
Housing & Economy
Median Home Value
$781,000
Median Household Income
$121,222
With 6,659 housing units across 3.3 square miles, 90603 has a housing density of 2,018 units per square mile. The home price-to-income ratio is 6.4x.
Location & Geography
Latitude
33.9454°
Longitude
-117.9925°
Land Area
3.3 sq mi
Water Area
0 sq mi
Nearby Zip Codes
Zip codes closest to 90603 (Whittier, CA) with distances:
All Zip Codes in Whittier, CA
Other zip codes serving Whittier:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 90603's $121,222. A way to compare Whittier 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 90603 (Whittier, 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.
Explore California
Popular "Near Me" Searches
Advertisement
People Also Ask
What zip code is Whittier, California?
Whittier, California uses zip code 90603 along with 5 other zip codes.
What county is zip code 90603 in?
Zip code 90603 is located in Los Angeles County, California.
What is the population of zip code 90603?
The population of zip code 90603 is 20,361 with a median age of 41.3.
Is 90603 in Whittier, California?
Yes, zip code 90603 is in Whittier, Los Angeles County, California. The area code is 818.
Frequently Asked Questions
What city is zip code 90603 in?
Zip code 90603 is in Whittier, California. It is part of Los Angeles County and uses the Pacific (PST/PDT) timezone.
What is zip code 90603?
Zip code 90603 is a U.S. postal code in Whittier, California (Los Angeles County). It has a population of 20,361 and covers 3.3 square miles.
What is the population of zip code 90603?
The population of zip code 90603 (Whittier, CA) is 20,361 with a median age of 41.3. There are approximately 6,659 housing units in this area.
What is the median income in zip code 90603?
The median household income in zip code 90603 (Whittier, CA) is $121,222 per year. The cost of living index is 221 (100 = national average).
What is the average home price in zip code 90603?
The median home value in zip code 90603 (Whittier, CA) is $781,000. The cost of living index is 221 compared to the national average of 100.
What county is zip code 90603 in?
Zip code 90603 is located in Los Angeles County, California. The primary city is Whittier.
What is the area code for zip code 90603?
Zip code 90603 in Whittier, CA uses area code 818. It is located in the Pacific (PST/PDT) timezone.
Is zip code 90603 a good place to live?
Zip code 90603 (Whittier, CA) has a cost of living index of 221 (100 = national average), a median household income of $121,222, and median home values of $781,000. The median age is 41.3. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 90603?
The cost of living index for zip code 90603 (Whittier, CA) is 221, where 100 represents the national average. This area is above the national average. Median home value: $781,000.
What schools serve zip code 90603?
Zip code 90603 in Whittier, California is served by the local school district of Los Angeles 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.
People Also Searched For
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.