Residential delivery area · Michigan
ZIP Code 48331: Farmington, MI
ZIP code 48331 uses the postal name Farmington, Michigan and lies entirely in Oakland County (Census 2020 ZIP-county file). About 22,000 people live there (Census Bureau, ACS 2020-2024), the 3rd most populous of Farmington's 4 residential ZIP codes. Median household income is $127,633 (Census Bureau, ACS 2020-2024). Most of its land (more than 99%) lies in the city of Farmington Hills.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Farmington · 4 residential ZIPs
- County
- Oakland County
- Census places
- Farmington Hills
- Metro area
- Detroit-Warren-Dearborn, MI
- House district
- MI-11 119th Congress
- State
- Michigan
- Time zone
- Eastern
- Land area
- 9.3 sq mi · 2,316 people per sq mi
Where is ZIP code 48331?
48331 centers on 42.502°, -83.409° and covers 9.3 square miles of land plus 0.0 of water. It borders 4 ZIP codes: 48322, 48335, 48334, 48377.
The map draws ZIP code areas only. For the streets inside 48331, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 48331 compare with the rest of Farmington?
| Measure | 48331 | In Farmington | In Oakland County | In MI |
|---|---|---|---|---|
| People (ACS 2020-2024) | 21,562 | 3rd of 4 | 31st of 71 | 173rd of 992 |
| Median household income | $128k | 1st of 4 | 20th of 70 | 26th of 774 |
| Median home value | $410k | 1st of 4 | 23rd of 71 | 42nd of 779 |
Its median household income is higher than in 93% of U.S. residential ZIP codes, and it is denser than 86% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 48331?
The 2020 Census counted 22,091 people in 48331; the ACS, which samples households over 2020-2024, estimates 21,562. Between the 2010 and 2020 censuses its population grew 2.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 21,562
- 2020 Census count
- 22,091+2.7% since 2010 (21,503)
- Households
- 8,786
- Median age
- 47.6
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 48331?
Of the 21,562 people the ACS estimates in 48331, 16.7% are under 18 and 24.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (65.7%), then Black (not Hispanic) (14.4%).
- Under 1816.7%
- 18 to 6459.0%
- 65 and older24.4%
- White, not Hispanic65.7%
- Black, not Hispanic14.4%
- Asian, not Hispanic12.8%
- Other or two or more4.3%
- Hispanic or Latino2.8%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 48331 earn?
Median household income is $127,633 (ACS 2020-2024), the 20th highest of the 70 ranked ZIP codes in Oakland County. It is not measurably different from 2015-2019 ($132,382 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $127,633
- Income per person
- $62,919
- Below the poverty line
- 6.8%
- Unemployed (of the labor force)
- 6.3%
- Adults 25+ with a bachelor's degree
- 66.5%
- Adjusted gross income per tax return, 2022
- $144,48511,530 returns; wages 60% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 48331?
FHFA's house price index for 48331, built from repeat sales and appraisals of the same homes, rose 69% from 2015 to 2025 and rose 41% from 2020 to 2025, and moved +2.4% in 2025.
- Median home value (owners' estimate)
- $410,000
- Median gross rent
- $1,828
- Homes owned by their occupants
- 78.8%
- Housing units
- 9,354
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 48331?
598 business establishments had a location in this ZIP code in 2023, 6 fewer than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services171
- Health care and social assistance66
- Finance and insurance63
- Wholesale trade55
- Administrative and support and waste management and remediation services38
- Retail trade28
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 48331?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 48322 | West Bloomfield | 32,885 | $114k | 2.7 mi |
| 48335 | Farmington | 25,077 | $99k | 2.7 mi |
| 48334 | Farmington | 19,618 | $102k | 3.0 mi |
| 48377 | Novi | 19,816 | $83k | 3.3 mi |
| 48375 | Novi | 24,029 | $113k | 3.8 mi (near) |
| 48336 | Farmington | 26,432 | $89k | 4.1 mi (near) |
| 48390 | Walled Lake | 23,939 | $91k | 4.7 mi (near) |
| 48323 | West Bloomfield | 17,235 | $145k | 5.0 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.