| ZIP Code | ZIP Code Place Name | County | ZIP Code Type |
|---|---|---|---|
| 48614 | Brant | Saginaw County | Standard |
| 48615 | Breckenridge | Gratiot County | Standard |
| 48637 | Merrill | Saginaw County | Standard |
| 48662 | Wheeler | Gratiot County | Standard |
| 48801 | Alma | Gratiot County | Standard |
| 48806 | Ashley | Gratiot County | Standard |
| 48807 | Bannister | Gratiot County | Standard |
| 48811 | Carson City | Montcalm County | Standard |
| 48830 | Elm Hall | Gratiot County | PO Box |
| 48831 | Elsie | Clinton County | Standard |
| 48832 | Elwell | Gratiot County | Standard |
| 48845 | Hubbardston | Ionia County | Standard |
| 48847 | Ithaca | Gratiot County | Standard |
| 48856 | Middleton | Gratiot County | Standard |
| 48862 | North Star | Gratiot County | PO Box |
| 48871 | Perrinton | Gratiot County | Standard |
| 48874 | Pompeii | Gratiot County | PO Box |
| 48877 | Riverdale | Gratiot County | Standard |
| 48879 | Saint Johns | Clinton County | Standard |
| 48880 | Saint Louis | Gratiot County | Standard |
| 48889 | Sumner | Gratiot County | Standard |
| 48891 | Vestaburg | Montcalm County | Standard |