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US ZIP Code Profile

ZIP Code 90603
Whittier, California

ZIP code 90603 is in Whittier, located in Los Angeles County, California, within the Los Angeles-Long Beach-Anaheim metro area. Its 2020 Census population was 21,174. The estimated median adjusted gross income per tax return is $71,313, and about 11% of filers report $200,000 or more.

2020 Population
21,174
Census ZCTA
County
Los Angeles
FIPS 06037
Median income (est.)
$71,313
IRS SOI 2022
Land Area
3.273 mi²
+ 0 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
Coordinates33.94539, -117.992485
Land / Water Area3.273 mi² land · 0 mi² water

02Income & Economics

Distribution of the 10,170 individual tax returns filed in 90603 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
20.3%
$25K–$50K
18.0%
$50K–$75K
13.7%
$75K–$100K
11.6%
$100K–$200K
25.4%
$200K+
11.0%
The $200,000+ bracket accounts for 38% of 90603's total adjusted gross income, from 11% of returns — a concentration that drives the gap between the median ($71,313) 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 90603's IRS income metrics, 2020–2022.

Median income (2021→2022)
$71,313
▲ 7.1%
Filers earning $200K+
11.0%
▲ 1.5 pt
Total filers
10,170
▼ 0.7%
GET /zipc/v2/zipcodes/90603/soi?year=… $61K 2020 $67K 2021 $71K 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 90603 ZCTA.

2000
19,101
 
2010
20,063
▲ +5.0%
2020
21,174
▲ +5.5%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 90603. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 90603

Whittier and its immediate neighbors, sorted by distance.

3 mi
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Distance from 90603 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 90603 in?

ZIP code 90603 is in Los Angeles County, California (county FIPS code 06037).

What city is ZIP code 90603?

The primary USPS city for 90603 is Whittier, CA.

What metro area (MSA) is 90603 in?

90603 is part of the Los Angeles-Long Beach-Anaheim, CA Metro Area (MSA code 31080).

What is the population of ZIP code 90603?

The 2020 Census population of 90603 was 21,174 residents.

What is the median income in ZIP code 90603?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 90603 is about $71,313, with around 11% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.