Residential delivery area · California
ZIP Code 90603: Whittier, CA
ZIP code 90603 is in Whittier, California, entirely in Los Angeles County (Census 2020 ZIP-county file). About 21,000 people live there (Census Bureau, ACS 2020-2024), the least populous of Whittier's 6 residential ZIP codes. Median household income is $136,705 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Whittier · 6 residential ZIPs
- County
- Los Angeles County
- Census places
- Whittier
- Neighborhood
- Colima GeoNames
- Metro area
- Los Angeles-Long Beach-Anaheim, CA
- House district
- CA-38 119th Congress
- State
- California
- Time zone
- Pacific
- Land area
- 3.2 sq mi · 6,677 people per sq mi
Where is ZIP code 90603?
90603 centers on 33.945°, -117.992° and covers 3.2 square miles of land. It borders 3 ZIP codes: 90604, 90605, 90631.
The map draws ZIP code areas only. For the streets inside 90603, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 90603 compare with the rest of Whittier?
| Measure | 90603 | In Whittier | In Los Angeles County | In CA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 21,118 | 6th of 6 | 219th of 301 | 797th of 1,802 |
| Median household income | $137k | 1st of 6 | 33rd of 265 | 229th of 1,189 |
| Median home value | $859k | 1st of 6 | 132nd of 273 | 479th of 1,317 |
Its median household income is higher than in 94% of U.S. residential ZIP codes, and it is denser than 96% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 90603?
The 2020 Census counted 21,174 people in 90603; the ACS, which samples households over 2020-2024, estimates 21,118. Between the 2010 and 2020 censuses its population grew 5.5% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 21,118
- 2020 Census count
- 21,174+5.5% since 2010 (20,063)
- Households
- 6,504
- Median age
- 40.8
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 90603?
Of the 21,118 people the ACS estimates in 90603, 22.1% are under 18 and 16.2% are 65 or older. The largest group by race and Hispanic origin is Hispanic or Latino (59.1%), then White (not Hispanic) (30.7%).
- Under 1822.1%
- 18 to 6461.7%
- 65 and older16.2%
- Hispanic or Latino59.1%
- White, not Hispanic30.7%
- Asian, not Hispanic6.2%
- Other or two or more3.3%
- Black, not Hispanic0.8%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 90603 earn?
Median household income is $136,705 (ACS 2020-2024), the 33rd highest of the 265 ranked ZIP codes in Los Angeles County. It is not measurably different from 2015-2019 ($127,036 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $136,705
- Income per person
- $50,125
- Below the poverty line
- 3.5%
- Unemployed (of the labor force)
- 4.6%
- Adults 25+ with a bachelor's degree
- 34.2%
- Adjusted gross income per tax return, 2022
- $102,14110,170 returns; wages 72% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 90603?
FHFA's house price index for 90603, built from repeat sales and appraisals of the same homes, rose 81% from 2015 to 2025 and rose 43% from 2020 to 2025, and moved +3.1% in 2025.
- Median home value (owners' estimate)
- $859,000
- Median gross rent
- $2,344
- Homes owned by their occupants
- 78.5%
- Housing units
- 6,746
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 90603?
458 business establishments had a location in this ZIP code in 2023, 34 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance88
- Accommodation and food services55
- Retail trade52
- Professional, scientific, and technical services46
- Other services (except public administration)45
- Finance and insurance38
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 90603?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 90604 | Whittier | 39,276 | $105k | 1.7 mi |
| 90605 | Whittier | 39,387 | $100k | 1.7 mi |
| 90631 | La Habra | 68,309 | $104k | 2.3 mi |
| 90602 | Whittier | 25,905 | $69k | 2.7 mi (near) |
| 90639 | La Mirada | 1,671 | – | 3.0 mi (near) |
| 90638 | La Mirada | 45,933 | $110k | 3.1 mi (near) |
| 91745 | Hacienda Heights | 54,351 | $109k | 3.9 mi (near) |
| 90670 | Santa Fe Springs | 17,851 | $89k | 4.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.