22 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Shelby township | 1 | 4,152 | 4,120 | 0.14% | 115 | 35.95 | Township |
| Newfield township | 2 | 2,377 | 2,338 | 0.17% | 68 | 34.83 | Township |
| Shelby | 3 | 2,180 | 2,164 | 0.14% | 1,328 | 1.64 | Village |
| Hart | 4 | 2,055 | 2,055 | 0% | 1,156 | 1.78 | City |
| Hart township | 5 | 2,045 | 2,030 | 0.1% | 60 | 33.82 | Township |
| Golden township | 6 | 1,699 | 1,663 | 0.41% | 51 | 33.45 | Township |
| Pentwater township | 7 | 1,661 | 1,658 | 0% | 124 | 13.35 | Township |
| Benona township | 8 | 1,437 | 1,429 | 0.07% | 35 | 40.65 | Township |
| Ferry township | 9 | 1,307 | 1,274 | 0.46% | 36 | 35.95 | Township |
| Weare township | 10 | 1,253 | 1,224 | 0.48% | 35 | 35.92 | Township |
| Greenwood township | 11 | 1,187 | 1,158 | 0.51% | 34 | 35.37 | Township |
| Elbridge township | 12 | 1,013 | 1,001 | 0.2% | 28 | 36.08 | Township |
| Hesperia | 13 | 977 | 967 | 0.21% | 1,194 | 0.82 | Village |
| Leavitt township | 14 | 942 | 913 | 0.43% | 27 | 35.07 | Township |
| Otto township | 15 | 914 | 858 | 1.22% | 26 | 35.60 | Township |
| Pentwater | 16 | 902 | 901 | 0% | 674 | 1.34 | Village |
| Claybanks township | 17 | 863 | 855 | 0.12% | 36 | 23.82 | Township |
| Colfax township | 18 | 456 | 449 | 0.22% | 13 | 35.27 | Township |
| New Era | 19 | 455 | 457 | 0% | 542 | 0.84 | Village |
| Rothbury | 20 | 447 | 439 | 0.45% | 182 | 2.46 | Village |
| Mears | 21 | 316 | 291 | 7.12% | 278 | 1.14 | CDP |
| Walkerville | 22 | 272 | 262 | 0.74% | 219 | 1.24 | Village |
Shelby township is the largest city in Oceana County, with a population of 4,152.
Walkerville is the smallest city in Oceana County.
There are 22 cities in Oceana County, Michigan.