Residential delivery area · Michigan
ZIP Code 49240: Grass Lake, MI
ZIP code 49240 uses the postal name Grass Lake, Michigan and lies mostly in Jackson County (85% of its land) with the rest in Washtenaw County (Census 2020 ZIP-county file). About 8,900 people live there (Census Bureau, ACS 2020-2024). Median household income is $99,681 (Census Bureau, ACS 2020-2024). By Census place, under 1% of its land lies in Grass Lake; more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Grass Lake · its only residential ZIP
- County
- Jackson County (85%); Washtenaw County (15%)
- Census places
- Grass Lake
- Metro area
- Jackson, MI
- House districts
- MI-5 (85%), MI-6 (15%) 119th Congress, by share of land
- State
- Michigan
- Time zone
- Eastern
- Land area
- 104.1 sq mi · 85 people per sq mi
Where is ZIP code 49240?
49240 centers on 42.272°, -84.180° and covers 104.1 square miles of land plus 3.6 of water. It borders 6 ZIP codes: 48118, 49259, 48158, 49230, 49285, 49201.
The map draws ZIP code areas only. For the streets inside 49240, 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 49240 compare with the rest of Jackson County?
| Measure | 49240 | In Jackson County | In MI |
|---|---|---|---|
| People (ACS 2020-2024) | 8,863 | 7th of 29 | 354th of 992 |
| Median household income | $100k | 2nd of 24 | 103rd of 774 |
| Median home value | $299k | 2nd of 26 | 158th of 779 |
Its median household income is higher than in 81% of U.S. residential ZIP codes, and it is denser than 51% 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 49240?
The 2020 Census counted 9,213 people in 49240; the ACS, which samples households over 2020-2024, estimates 8,863. Between the 2010 and 2020 censuses its population grew 5.9% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 8,863
- 2020 Census count
- 9,213+5.9% since 2010 (8,703)
- Households
- 3,629
- Median age
- 46.8
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 49240?
Of the 8,863 people the ACS estimates in 49240, 18.7% are under 18 and 22.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (94.3%).
- Under 1818.7%
- 18 to 6458.7%
- 65 and older22.5%
- White, not Hispanic94.3%
- Hispanic or Latino2.7%
- Other or two or more2.0%
- Asian, not Hispanic0.7%
- Black, not Hispanic0.3%
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 49240 earn?
Median household income is $99,681 (ACS 2020-2024), the 2nd highest of the 24 ranked ZIP codes in Jackson County. It is not measurably different from 2015-2019 ($106,288 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $99,681
- Income per person
- $50,282
- Below the poverty line
- 4.2%
- Unemployed (of the labor force)
- 2.0%
- Adults 25+ with a bachelor's degree
- 31.9%
- Adjusted gross income per tax return, 2022
- $85,4624,680 returns; wages 70% 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 49240?
FHFA's house price index for 49240, built from repeat sales and appraisals of the same homes, rose 92% from 2015 to 2025 and rose 53% from 2020 to 2025, and moved +4.3% in 2025.
- Median home value (owners' estimate)
- $298,700
- Median gross rent
- $1,135
- Homes owned by their occupants
- 92.6%
- Housing units
- 3,907
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 49240?
129 business establishments had a location in this ZIP code in 2023, 5 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction28
- Other services (except public administration)15
- Professional, scientific, and technical services14
- Health care and social assistance14
- Retail trade10
- Accommodation and food services10
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 49240?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 48118 | Chelsea | 13,246 | $88k | 7.9 mi |
| 49259 | Munith | 2,653 | $67k | 8.6 mi |
| 48158 | Manchester | 7,770 | $95k | 11.1 mi |
| 49230 | Brooklyn | 10,077 | $84k | 12.7 mi |
| 49285 | Stockbridge | 6,240 | $73k | 13.3 mi |
| 49201 | Jackson | 49,107 | $75k | 14.4 mi |
| 49263 | Norvell | 0 | – | 7.9 mi (near) |
| 49254 | Michigan Center | 3,484 | $64k | 8.0 mi (near) |
| 49261 | Napoleon | 199 | $92k | 8.3 mi (near) |
| 49202 | Jackson | 18,519 | $43k | 11.8 mi (near) |
| 49203 | Jackson | 36,474 | $56k | 11.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.