Founded in 1822, Sanilac County is one of 83 counties in the state of Michigan. Historically, Sanilac County was formed from part of St. Clair County. The city of Sandusky is the county seat. With FIPS code of 151, Sanilac County has a population of 40,506 and area of 1,590 square miles (4,118 km2).
List of all cities in Sanilac County, MI alphabetically
| City/Town | Postal Code | Area Code |
| Applegate, MI | 48401 | 810 |
| Argyle, MI | 48410 | 989 |
| Brown City, MI | 48416 | 810 |
| Carsonville, MI | 48419 | 810 |
| Croswell, MI | 48422 | 810 |
| Decker, MI | 48426 | 810 |
| Deckerville, MI | 48427 | 810 |
| Forestville, MI | 48434 | 989 |
| Lexington, MI | 48450 | 810 |
| Marlette, MI | 48453 | 989 |
| Melvin, MI | 48454 | 810 |
| Minden, MI | 48456 | 989 |
| Minden City, MI | 48456 | 989 |
| 48465 | 989 | |
| Palms, MI | 48465 | 989 |
| Peck, MI | 48466 | 810 |
| Port Sanilac, MI | 48469 | 810 |
| Sandusky, MI | 48471 | 810 |
| Snover, MI | 48472 | 810 |