16 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Skidway Lake | 1 | 2,752 | 3,289 | -1.54% | 244 | 11.29 | CDP |
| Deep River township | 2 | 2,104 | 2,051 | 0.43% | 60 | 35.28 | Township |
| Standish township | 3 | 1,703 | 1,680 | 0.12% | 62 | 27.63 | Township |
| Standish | 4 | 1,455 | 1,459 | -0.07% | 668 | 2.18 | City |
| Moffatt township | 5 | 1,179 | 1,164 | 0.17% | 37 | 31.49 | Township |
| Sims township | 6 | 994 | 984 | 0.1% | 87 | 11.47 | Township |
| Au Gres | 7 | 965 | 954 | 0.21% | 424 | 2.28 | City |
| Whitney township | 8 | 920 | 906 | 0.11% | 30 | 30.73 | Township |
| Au Gres township | 9 | 893 | 893 | -0.11% | 27 | 33.34 | Township |
| Arenac township | 10 | 874 | 865 | 0.11% | 24 | 35.77 | Township |
| Adams township | 11 | 564 | 556 | 0.36% | 16 | 35.64 | Township |
| Turner township | 12 | 523 | 519 | 0% | 17 | 31.14 | Township |
| Sterling | 13 | 461 | 456 | 0.22% | 472 | 0.98 | Village |
| Omer | 14 | 287 | 277 | 0.7% | 254 | 1.13 | City |
| Twining | 15 | 140 | 140 | 0% | 144 | 0.97 | Village |
| Turner | 16 | 120 | 120 | 0% | 117 | 1.02 | Village |
Skidway Lake is the largest city in Arenac County, with a population of 2,752.
Turner is the smallest city in Arenac County.
There are 16 cities in Arenac County, Michigan.