Founded in 1831, Oceana County is one of 83 counties in the state of Michigan. Historically, Oceana County was formed from part of Mackinac County. The city of Hart is the county seat. With FIPS code of 127, Oceana County has a population of 26,815 and area of 1,307 square miles (3,385 km2).
List of all cities in Oceana County, MI alphabetically
| City/Town | Postal Code | Area Code |
| Hart, MI | 49420 | 231 |
| Hesperia, MI | 49421 | 231 |
| Mears, MI | 49436 | 231 |
| New Era, MI | 49446 | 231 |
| Pentwater, MI | 49449 | 231 |
| Rothbury, MI | 49452 | 231 |
| Shelby, MI | 49455 | 231 |
| Silver Lake, MI | 49436 | 231 |
| Walkerville, MI | 49459 | 231 |