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US ZIP Code Profile

ZIP Code 92831
Fullerton, California

ZIP code 92831 is in Fullerton, located in Orange County, California, within the Los Angeles-Long Beach-Anaheim metro area. Its 2020 Census population was 38,953. The estimated median adjusted gross income per tax return is $49,841, and about 9% of filers report $200,000 or more.

2020 Population
38,953
Census ZCTA
County
Orange
FIPS 06059
Median income (est.)
$49,841
IRS SOI 2022
Land Area
5.977 mi²
+ 0 mi² water

01Location & Geography

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

Primary CityFullerton, CA
CountyOrange County (FIPS 06059)
StateCalifornia (FIPS 06)
Metro Area (MSA)Los Angeles-Long Beach-Anaheim, CA Metro Area (31080)
Census Region / DivisionWest Region · Pacific Division
Coordinates33.87977, -117.89635
Land / Water Area5.977 mi² land · 0 mi² water

02Income & Economics

Distribution of the 16,190 individual tax returns filed in 92831 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
25.9%
$25K–$50K
24.2%
$50K–$75K
16.0%
$75K–$100K
9.2%
$100K–$200K
15.9%
$200K+
8.8%
The $200,000+ bracket accounts for 43% of 92831's total adjusted gross income, from 9% of returns — a concentration that drives the gap between the median ($49,841) 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 92831's IRS income metrics, 2020–2022.

Median income (2021→2022)
$49,841
▲ 7.4%
Filers earning $200K+
8.8%
▲ 0.4 pt
Total filers
16,190
▼ 1.3%
GET /zipc/v2/zipcodes/92831/soi?year=… $43K 2020 $46K 2021 $50K 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 92831 ZCTA.

2000
34,589
 
2010
34,204
▼ -1.1%
2020
38,953
▲ +13.9%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 92831. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 92831

Fullerton and its immediate neighbors, sorted by distance.

3 mi
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Distance from 92831 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 Number052904
City AliasesFullerton

07Frequently Asked Questions

What county is ZIP code 92831 in?

ZIP code 92831 is in Orange County, California (county FIPS code 06059).

What city is ZIP code 92831?

The primary USPS city for 92831 is Fullerton, CA.

What metro area (MSA) is 92831 in?

92831 is part of the Los Angeles-Long Beach-Anaheim, CA Metro Area (MSA code 31080).

What is the population of ZIP code 92831?

The 2020 Census population of 92831 was 38,953 residents.

What is the median income in ZIP code 92831?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 92831 is about $49,841, with around 9% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.