18 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 48422 | Croswell | 6,005 |
| 48471 | Sandusky | 5,613 |
| 48416 | Brown City | 5,291 |
| 48453 | Marlette | 4,991 |
| 48450 | Lexington | 4,503 |
| 48427 | Deckerville | 2,899 |
| 48475 | Ubly | 2,613 |
| 48419 | Carsonville | 2,196 |
| 48466 | Peck | 1,501 |
| 48472 | Snover | 1,403 |
| 48469 | Port Sanilac | 1,295 |
| 48401 | Applegate | 1,289 |
| 48426 | Decker | 1,280 |
| 48454 | Melvin | 1,162 |
| 48456 | Minden City | 728 |
| 48465 | Palms | 553 |
| 48434 | Forestville | 132 |
| 48410 | Argyle | 114 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 18 ZCTAs in Sanilac County, Michigan (US Census).