Zip Code 49240 — Grass Lake, MI
49240 is a ZIP Code associated with Grass Lake, MI, located within Jackson. The postal region supports an estimated population of 8,863 residents across Data Pending housing units, with a population density of 32.9 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (42.278210, -84.180270)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 49240 |
| Primary City | Grass Lake |
| State / Province | MI |
| County | Jackson |
| Total Population | 8,863 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 32.9 people/sq mi |
| Timezone | America/Detroit |
How 49240 Compares
| Metric | ZIP 49240 | Jackson County | MI State Average |
|---|
| Population | 8,863 | 159,537 | 10,077,716 |
| Median Income | Data Pending | N/A | N/A |
| Population Density | 32.9 /sq mi | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →