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US ZIP Code Profile

ZIP Code 90403
Santa Monica, California

ZIP code 90403 is in Santa Monica, located in Los Angeles County, California, within the Los Angeles-Long Beach-Anaheim metro area. Its 2020 Census population was 25,278. The estimated median adjusted gross income per tax return is $99,224, and about 25% of filers report $200,000 or more.

2020 Population
25,278
Census ZCTA
County
Los Angeles
FIPS 06037
Median income (est.)
$99,224
IRS SOI 2022
Land Area
1.428 mi²
+ 0.095 mi² water

01Location & Geography

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

Primary CitySanta Monica, 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
Coordinates34.030754, -118.4921
Land / Water Area1.428 mi² land · 0.095 mi² water

02Income & Economics

Distribution of the 13,490 individual tax returns filed in 90403 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
16.2%
$25K–$50K
11.8%
$50K–$75K
11.6%
$75K–$100K
10.8%
$100K–$200K
24.9%
$200K+
24.8%
The $200,000+ bracket accounts for 70% of 90403's total adjusted gross income, from 25% of returns — a concentration that drives the gap between the median ($99,224) 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 90403's IRS income metrics, 2020–2022.

Median income (2021→2022)
$99,224
▲ 6.3%
Filers earning $200K+
24.8%
▲ 1.7 pt
Total filers
13,490
▼ 2.0%
GET /zipc/v2/zipcodes/90403/soi?year=… $81K 2020 $93K 2021 $99K 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 90403 ZCTA.

2000
23,556
 
2010
24,525
▲ +4.1%
2020
25,278
▲ +3.1%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 90403. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 90403

Santa Monica and its immediate neighbors, sorted by distance.

3 mi
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Distance from 90403 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 SortB
USPS Finance Number056978
City AliasesSanta Monica

07Frequently Asked Questions

What county is ZIP code 90403 in?

ZIP code 90403 is in Los Angeles County, California (county FIPS code 06037).

What city is ZIP code 90403?

The primary USPS city for 90403 is Santa Monica, CA.

What metro area (MSA) is 90403 in?

90403 is part of the Los Angeles-Long Beach-Anaheim, CA Metro Area (MSA code 31080).

What is the population of ZIP code 90403?

The 2020 Census population of 90403 was 25,278 residents.

What is the median income in ZIP code 90403?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 90403 is about $99,224, with around 25% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.