Residential delivery area · California
ZIP Code 90604: South Whittier (Whittier), CA
ZIP code 90604 is in South Whittier (postal name Whittier), California, entirely in Los Angeles County (Census 2020 ZIP-county file). About 39,000 people live there (Census Bureau, ACS 2020-2024), the 2nd most populous of Whittier's 6 residential ZIP codes. Median household income is $105,074 (Census Bureau, ACS 2020-2024). By Census place, its land lies in South Whittier (69%) and East Whittier (26%), and 5% in smaller places.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Whittier · 6 residential ZIPs
- County
- Los Angeles County
- Census places
- South Whittier (69%) census-designated place; East Whittier (26%) census-designated place
- Neighborhood
- Leffingwell GeoNames
- Metro area
- Los Angeles-Long Beach-Anaheim, CA
- House district
- CA-38 119th Congress
- State
- California
- Time zone
- Pacific
- Land area
- 4.2 sq mi · 9,331 people per sq mi
Where is ZIP code 90604?
90604 centers on 33.928°, -118.014° and covers 4.2 square miles of land plus 0.0 of water. It borders 4 ZIP codes: 90603, 90605, 90638, 90631.
The map draws ZIP code areas only. For the streets inside 90604, 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 90604 compare with the rest of Whittier?
| Measure | 90604 | In Whittier | In Los Angeles County | In CA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 39,276 | 2nd of 6 | 101st of 301 | 395th of 1,802 |
| Median household income | $105k | 2nd of 6 | 97th of 265 | 516th of 1,189 |
| Median home value | $785k | 3rd of 6 | 169th of 273 | 593rd of 1,317 |
Its median household income is higher than in 84% of U.S. residential ZIP codes, and it is denser than 98% 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 90604?
The 2020 Census counted 40,110 people in 90604; the ACS, which samples households over 2020-2024, estimates 39,276. Between the 2010 and 2020 censuses its population grew 1.8% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 39,276
- 2020 Census count
- 40,110+1.8% since 2010 (39,407)
- Households
- 11,725
- Median age
- 37.3
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 90604?
Of the 39,276 people the ACS estimates in 90604, 23.0% are under 18 and 12.3% are 65 or older. The largest group by race and Hispanic origin is Hispanic or Latino (69.6%), then White (not Hispanic) (18.1%).
- Under 1823.0%
- 18 to 6464.8%
- 65 and older12.3%
- Hispanic or Latino69.6%
- White, not Hispanic18.1%
- Asian, not Hispanic8.2%
- Other or two or more2.6%
- Black, not Hispanic1.4%
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 90604 earn?
Median household income is $105,074 (ACS 2020-2024), the 97th highest of the 265 ranked ZIP codes in Los Angeles County. It rose from $91,956 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $105,074
- Income per person
- $38,636
- Below the poverty line
- 6.3%
- Unemployed (of the labor force)
- 3.0%
- Adults 25+ with a bachelor's degree
- 24.4%
- Adjusted gross income per tax return, 2022
- $70,36418,770 returns; wages 83% 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 90604?
FHFA's house price index for 90604, built from repeat sales and appraisals of the same homes, rose 93% from 2015 to 2025 and rose 45% from 2020 to 2025, and moved +4.2% in 2025.
- Median home value (owners' estimate)
- $785,200
- Median gross rent
- $1,904
- Homes owned by their occupants
- 65.4%
- Housing units
- 12,076
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 90604?
308 business establishments had a location in this ZIP code in 2023, 73 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance48
- Construction40
- Retail trade39
- Other services (except public administration)38
- Transportation and warehousing26
- Professional, scientific, and technical services26
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 90604?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 90603 | Whittier | 21,118 | $137k | 1.7 mi |
| 90605 | Whittier | 39,387 | $100k | 1.8 mi |
| 90638 | La Mirada | 45,933 | $110k | 1.8 mi |
| 90631 | La Habra | 68,309 | $104k | 3.7 mi |
| 90639 | La Mirada | 1,671 | – | 1.5 mi (near) |
| 90670 | Santa Fe Springs | 17,851 | $89k | 2.8 mi (near) |
| 90602 | Whittier | 25,905 | $69k | 3.3 mi (near) |
| 90621 | Buena Park | 35,984 | $98k | 3.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.