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US ZIP Code Profile

ZIP Code 91773
San Dimas, California

ZIP code 91773 is in San Dimas, located in Los Angeles County, California, within the Los Angeles-Long Beach-Anaheim metro area. Its 2020 Census population was 34,592. The estimated median adjusted gross income per tax return is $64,709, and about 11% of filers report $200,000 or more.

2020 Population
34,592
Census ZCTA
County
Los Angeles
FIPS 06037
Median income (est.)
$64,709
IRS SOI 2022
Land Area
14.305 mi²
+ 0.389 mi² water

01Location & Geography

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

Primary CitySan Dimas, 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
Coordinates34.110188, -117.81039
Land / Water Area14.305 mi² land · 0.389 mi² water

02Income & Economics

Distribution of the 16,550 individual tax returns filed in 91773 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
23.2%
$25K–$50K
18.6%
$50K–$75K
14.0%
$75K–$100K
10.9%
$100K–$200K
22.8%
$200K+
10.6%
The $200,000+ bracket accounts for 40% of 91773's total adjusted gross income, from 11% of returns — a concentration that drives the gap between the median ($64,709) 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 91773's IRS income metrics, 2020–2022.

Median income (2021→2022)
$64,709
▲ 5.9%
Filers earning $200K+
10.6%
▲ 0.7 pt
Total filers
16,550
▼ 2.4%
GET /zipc/v2/zipcodes/91773/soi?year=… $55K 2020 $61K 2021 $65K 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 91773 ZCTA.

2000
33,865
 
2010
33,119
▼ -2.2%
2020
34,592
▲ +4.4%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 91773. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 91773

San Dimas and its immediate neighbors, sorted by distance.

3 mi
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Distance from 91773 to any ZIP

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06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number056774
City AliasesSan Dimas

07Frequently Asked Questions

What county is ZIP code 91773 in?

ZIP code 91773 is in Los Angeles County, California (county FIPS code 06037).

What city is ZIP code 91773?

The primary USPS city for 91773 is San Dimas, CA.

What metro area (MSA) is 91773 in?

91773 is part of the Los Angeles-Long Beach-Anaheim, CA Metro Area (MSA code 31080).

What is the population of ZIP code 91773?

The 2020 Census population of 91773 was 34,592 residents.

What is the median income in ZIP code 91773?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 91773 is about $64,709, 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.