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US ZIP Code Profile

ZIP Code 90604
Whittier, California

ZIP code 90604 is in Whittier, located in Los Angeles County, California, within the Los Angeles-Long Beach-Anaheim metro area. Its 2020 Census population was 40,110. The estimated median adjusted gross income per tax return is $51,632, and about 4% of filers report $200,000 or more.

2020 Population
40,110
Census ZCTA
County
Los Angeles
FIPS 06037
Median income (est.)
$51,632
IRS SOI 2022
Land Area
4.261 mi²
+ 0.004 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityWhittier, CA
CountyLos Angeles County (FIPS 06037)
StateCalifornia (FIPS 06)
Metro Area (MSA)Los Angeles-Long Beach-Anaheim, CA Metro Area (31080)
Census Region / DivisionWest Region · Pacific Division
Coordinates33.927692, -118.013824
Land / Water Area4.261 mi² land · 0.004 mi² water

02Income & Economics

Distribution of the 18,770 individual tax returns filed in 90604 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
24.3%
$25K–$50K
24.6%
$50K–$75K
16.7%
$75K–$100K
10.8%
$100K–$200K
19.2%
$200K+
4.4%
The $200,000+ bracket accounts for 17% of 90604's total adjusted gross income, from 4% of returns — a concentration that drives the gap between the median ($51,632) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 90604's IRS income metrics, 2020–2022.

Median income (2021→2022)
$51,632
▲ 8.2%
Filers earning $200K+
4.4%
▲ 0.8 pt
Total filers
18,770
▼ 1.8%
GET /zipc/v2/zipcodes/90604/soi?year=… $44K 2020 $48K 2021 $52K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 90604 ZCTA.

2000
37,869
 
2010
39,407
▲ +4.1%
2020
40,110
▲ +1.8%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 90604. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 90604

Whittier and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 90604 to any ZIP

Enter a 5-digit ZIP to calculate the distance.

06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number058454
City AliasesWhittier

07Frequently Asked Questions

What county is ZIP code 90604 in?

ZIP code 90604 is in Los Angeles County, California (county FIPS code 06037).

What city is ZIP code 90604?

The primary USPS city for 90604 is Whittier, CA.

What metro area (MSA) is 90604 in?

90604 is part of the Los Angeles-Long Beach-Anaheim, CA Metro Area (MSA code 31080).

What is the population of ZIP code 90604?

The 2020 Census population of 90604 was 40,110 residents.

What is the median income in ZIP code 90604?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 90604 is about $51,632, with around 4% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.