Residential delivery area · Michigan
ZIP Code 48131: Dundee, MI
ZIP code 48131 uses the postal name Dundee, Michigan and lies entirely in Monroe County (Census 2020 ZIP-county file). About 8,600 people live there (Census Bureau, ACS 2020-2024). Median household income is $85,747 (Census Bureau, ACS 2020-2024). By Census place, 11% of its land lies in Dundee; 90% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Dundee · its only residential ZIP
- County
- Monroe County
- Census places
- Dundee
- Metro area
- Monroe, MI
- House district
- MI-5 119th Congress
- State
- Michigan
- Time zone
- Eastern
- Land area
- 50.1 sq mi · 172 people per sq mi
Where is ZIP code 48131?
48131 centers on 41.967°, -83.673° and covers 50.1 square miles of land plus 0.5 of water. It borders 8 ZIP codes: 49270, 49238, 48159, 48140, 48160, 49229, 48161, 48162.
The map draws ZIP code areas only. For the streets inside 48131, 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 48131 compare with the rest of Monroe County?
| Measure | 48131 | In Monroe County | In MI |
|---|---|---|---|
| People (ACS 2020-2024) | 8,637 | 10th of 23 | 361st of 992 |
| Median household income | $86k | 10th of 20 | 193rd of 774 |
| Median home value | $274k | 6th of 21 | 193rd of 779 |
Its median household income is higher than in 69% of U.S. residential ZIP codes, and it is denser than 61% 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 48131?
The 2020 Census counted 8,126 people in 48131; the ACS, which samples households over 2020-2024, estimates 8,637. Between the 2010 and 2020 censuses its population grew 20.1% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 8,637
- 2020 Census count
- 8,126+20.1% since 2010 (6,764)
- Households
- 3,656
- Median age
- 36.2
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 48131?
Of the 8,637 people the ACS estimates in 48131, 23.5% are under 18 and 12.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (92.2%).
- Under 1823.5%
- 18 to 6463.8%
- 65 and older12.6%
- White, not Hispanic92.2%
- Hispanic or Latino4.7%
- Other or two or more2.9%
- Asian, not Hispanic0.1%
- Black, not Hispanic0.0%
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 48131 earn?
Median household income is $85,747 (ACS 2020-2024), the 10th highest of the 20 ranked ZIP codes in Monroe County. It is not measurably different from 2015-2019 ($76,124 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $85,747
- Income per person
- $45,965
- Below the poverty line
- 4.3%
- Unemployed (of the labor force)
- 3.5%
- Adults 25+ with a bachelor's degree
- 34.6%
- Adjusted gross income per tax return, 2022
- $71,8944,170 returns; wages 77% 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 48131?
FHFA's house price index for 48131, built from repeat sales and appraisals of the same homes, rose 103% from 2015 to 2025 and rose 51% from 2020 to 2025, and moved +11.4% in 2025.
- Median home value (owners' estimate)
- $274,200
- Median gross rent
- $1,243
- Homes owned by their occupants
- 69.6%
- Housing units
- 3,852
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 48131?
175 business establishments had a location in this ZIP code in 2023, 16 more than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade34
- Accommodation and food services28
- Construction15
- Health care and social assistance15
- Manufacturing14
- Professional, scientific, and technical services12
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 48131?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 49270 | Petersburg | 5,567 | $95k | 6.5 mi |
| 49238 | Deerfield | 1,914 | $75k | 7.3 mi |
| 48159 | Maybee | 2,578 | $75k | 7.5 mi |
| 48140 | Ida | 3,664 | $109k | 7.6 mi |
| 48160 | Milan | 13,972 | $104k | 8.0 mi |
| 49229 | Britton | 3,540 | $95k | 8.1 mi |
| 48161 | Monroe | 26,304 | $67k | 11.1 mi |
| 48162 | Monroe | 28,156 | $68k | 12.5 mi |
| 48190 | Whittaker | 76 | $77k | 11.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.