Residential delivery area · Michigan
ZIP Code 48189: Whitmore Lake, MI
ZIP code 48189 uses the postal name Whitmore Lake, Michigan and lies mostly in Washtenaw County (70% of its land) with the rest in Livingston County (Census 2020 ZIP-county file). About 14,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $87,145 (Census Bureau, ACS 2020-2024). By Census place, 11% of its land lies in Whitmore Lake (a census-designated place); 89% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Whitmore Lake · its only residential ZIP
- County
- Washtenaw County (70%); Livingston County (30%)
- Census places
- Whitmore Lake census-designated place
- Metro area
- Ann Arbor, MI
- House districts
- MI-6 (70%), MI-7 (30%) 119th Congress, by share of land
- State
- Michigan
- Time zone
- Eastern
- Land area
- 34.2 sq mi · 406 people per sq mi
Where is ZIP code 48189?
48189 centers on 42.410°, -83.783° and covers 34.2 square miles of land plus 2.2 of water. It borders 6 ZIP codes: 48139, 48116, 48178, 48130, 48105, 48169.
The map draws ZIP code areas only. For the streets inside 48189, 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 48189 compare with the rest of Washtenaw County?
| Measure | 48189 | In Washtenaw County | In MI |
|---|---|---|---|
| People (ACS 2020-2024) | 13,893 | 16th of 27 | 271st of 992 |
| Median household income | $87k | 17th of 24 | 179th of 774 |
| Median home value | $313k | 13th of 25 | 133rd of 779 |
Its median household income is higher than in 70% of U.S. residential ZIP codes, and it is denser than 70% 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 48189?
The 2020 Census counted 14,038 people in 48189; the ACS, which samples households over 2020-2024, estimates 13,893. Between the 2010 and 2020 censuses its population grew 3.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 13,893
- 2020 Census count
- 14,038+3.0% since 2010 (13,632)
- Households
- 5,833
- Median age
- 41.6
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 48189?
Of the 13,893 people the ACS estimates in 48189, 19.1% are under 18 and 19.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (89.6%).
- Under 1819.1%
- 18 to 6461.5%
- 65 and older19.5%
- White, not Hispanic89.6%
- Other or two or more3.6%
- Black, not Hispanic3.0%
- Hispanic or Latino2.9%
- Asian, not Hispanic0.9%
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 48189 earn?
Median household income is $87,145 (ACS 2020-2024), the 17th highest of the 24 ranked ZIP codes in Washtenaw County. It is not measurably different from 2015-2019 ($89,868 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $87,145
- Income per person
- $49,944
- Below the poverty line
- 5.9%
- Unemployed (of the labor force)
- 2.1%
- Adults 25+ with a bachelor's degree
- 38.7%
- Adjusted gross income per tax return, 2022
- $93,1636,950 returns; wages 66% 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 48189?
FHFA's house price index for 48189, built from repeat sales and appraisals of the same homes, rose 87% from 2015 to 2025 and rose 46% from 2020 to 2025, and moved +8.3% in 2025.
- Median home value (owners' estimate)
- $313,400
- Median gross rent
- $1,246
- Homes owned by their occupants
- 79.3%
- Housing units
- 6,107
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 48189?
269 business establishments had a location in this ZIP code in 2023, 10 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction46
- Retail trade33
- Other services (except public administration)28
- Manufacturing25
- Professional, scientific, and technical services21
- Health care and social assistance21
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 48189?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 48139 | Hamburg | 96 | $47k | 3.3 mi |
| 48116 | Brighton | 27,289 | $107k | 6.7 mi |
| 48178 | South Lyon | 37,789 | $132k | 6.8 mi |
| 48130 | Dexter | 16,986 | $129k | 7.2 mi |
| 48105 | Ann Arbor | 37,048 | $95k | 7.2 mi |
| 48169 | Pinckney | 20,519 | $109k | 9.1 mi |
| 48143 | Lakeland | 139 | – | 4.8 mi (near) |
| 48109 | Ann Arbor | 5,939 | $14k | 9.0 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.