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US ZIP Code Profile

ZIP Code 48331
Farmington, Michigan

ZIP code 48331 is in Farmington, located in Oakland County, Michigan, within the Detroit-Warren-Dearborn metro area. Its 2020 Census population was 22,091. The estimated median adjusted gross income per tax return is $86,746, and about 19% of filers report $200,000 or more.

2020 Population
22,091
Census ZCTA
County
Oakland
FIPS 26125
Median income (est.)
$86,746
IRS SOI 2022
Land Area
9.292 mi²
+ 0.012 mi² water

01Location & Geography

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

Primary CityFarmington, MI
CountyOakland County (FIPS 26125)
StateMichigan (FIPS 26)
Metro Area (MSA)Detroit-Warren-Dearborn, MI Metro Area (19820)
Census Region / DivisionMidwest Region · East North Central Division
Coordinates42.502487, -83.408936
Land / Water Area9.292 mi² land · 0.012 mi² water

02Income & Economics

Distribution of the 11,530 individual tax returns filed in 48331 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
21.2%
$25K–$50K
12.8%
$50K–$75K
11.2%
$75K–$100K
10.1%
$100K–$200K
25.9%
$200K+
18.8%
The $200,000+ bracket accounts for 59% of 48331's total adjusted gross income, from 19% of returns — a concentration that drives the gap between the median ($86,746) 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 48331's IRS income metrics, 2020–2022.

Median income (2021→2022)
$86,746
▲ 2.3%
Filers earning $200K+
18.8%
▲ 0.8 pt
Total filers
11,530
▼ 0.8%
GET /zipc/v2/zipcodes/48331/soi?year=… $76K 2020 $85K 2021 $87K 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 48331 ZCTA.

2000
23,000
 
2010
21,503
▼ -6.5%
2020
22,091
▲ +2.7%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 48331. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 48331

Farmington and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 48331 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 Number253150
City AliasesFarmington, Farmington Hills, Farmington Hls, Farmingtn Hls

07Frequently Asked Questions

What county is ZIP code 48331 in?

ZIP code 48331 is in Oakland County, Michigan (county FIPS code 26125).

What city is ZIP code 48331?

The primary USPS city for 48331 is Farmington, MI.

What metro area (MSA) is 48331 in?

48331 is part of the Detroit-Warren-Dearborn, MI Metro Area (MSA code 19820).

What is the population of ZIP code 48331?

The 2020 Census population of 48331 was 22,091 residents.

What is the median income in ZIP code 48331?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 48331 is about $86,746, with around 19% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.