Zip Code 48889 — Sumner, MI
48889 is a ZIP Code associated with Sumner, MI, located within Gratiot. 48889 ranks #8 out of 14 ZIP codes in Gratiot County by population (and #744 out of 992 in MI). The area supports an estimated population of 1,528 residents across Data Pending housing units, with a population density of 19.0 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (43.291330, -84.797010)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 48889 |
| Primary City | Sumner |
| State / Province | MI |
| County | Gratiot |
| Total Population | 1,528 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 19.0 people/sq mi |
| Timezone | America/Detroit |
How 48889 Compares
| Metric | ZIP 48889 | Gratiot County | MI State Average |
|---|
| Population | 1,528 | 43,623 (Total) | 10,077,716 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 19.0 /sq mi | -- | -- |
| County Pop Rank | #8 of 14 | -- | -- |
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 →