Gratiot County, Michigan ZIP codes
15 ZIP codes are in Gratiot County, plus 7 that cross in from neighboring counties. It's part of the Alma, MI micro area.
- ZIP codes
- 15
- Population in these ZIPs
- 43,623
- Avg. median income
- $64,000population-weighted
- Cities & towns
- 15
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Gratiot County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 48615 | Breckenridge | 3,061 | $70,000 | $178,900 |
| 48662 | Wheeler | 1,185 | $70,321 | $186,900 |
| 48801 | Alma | 13,278 | $58,750 | $164,800 |
| 48806 | Ashley | 1,752 | $61,375 | $193,000 |
| 48807 | Bannister | 658 | $60,825 | $183,300 |
| 48830 PO Box | Elm Hall | — | — | — |
| 48832 | Elwell | 1,307 | $73,393 | $200,600 |
| 48847 | Ithaca | 5,663 | $66,264 | $196,000 |
| 48856 | Middleton | 966 | $91,413 | $157,500 |
| 48862 | North Star | 59 | $51,563 | $75,800 |
| 48871 | Perrinton | 2,103 | $84,803 | $284,200 |
| 48874 | Pompeii | 107 | $75,774 | $111,300 |
| 48877 | Riverdale | 1,962 | $64,653 | $191,200 |
| 48880 | Saint Louis | 9,994 | $59,922 | $167,600 |
| 48889 | Sumner | 1,528 | $60,200 | $207,900 |
ZIP codes partly in Gratiot County
These ZIP codes are mostly in a neighboring county but cover part of Gratiot County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 48614 | Brant | Saginaw County | 943 | $63,393 | $216,100 |
| 48637 | Merrill | Saginaw County | 3,024 | $65,865 | $204,400 |
| 48811 | Carson City | Montcalm County | 7,440 | $70,625 | $209,000 |
| 48831 | Elsie | Clinton County | 3,088 | $63,299 | $203,100 |
| 48845 | Hubbardston | Ionia County | 1,218 | $86,042 | $203,300 |
| 48879 | Saint Johns | Clinton County | 18,413 | $79,129 | $294,600 |
| 48883 | Shepherd | Isabella County | 7,292 | $65,223 | $224,700 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Gratiot County
Nearby counties
Frequently asked questions
How many ZIP codes are in Gratiot County, Michigan?
15 ZIP codes are mainly in Gratiot County, and 7 more ZIP codes from neighboring areas reach partly into it.
What cities are in Gratiot County?
ZIP codes in Gratiot County use the city names Alma, Ashley, Bannister, Breckenridge, Elm Hall, Elwell, Ithaca, Middleton, North Star, Perrinton, Pompeii and Riverdale and others.
What metro area is Gratiot County in?
Gratiot County is part of the Alma, MI micropolitan statistical area.