18 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Rugby | 1 | 2,409 | 2,501 | -0.74% | 1,054 | 2.29 | City |
| Meyer township | 2 | 99 | 103 | -1% | 3 | 33.98 | Township |
| Hagel township | 3 | 72 | 74 | -1.37% | 2 | 35.82 | Township |
| Ness township | 4 | 69 | 72 | -1.43% | 2 | 36.49 | Township |
| Tuscarora township | 5 | 66 | 70 | -1.49% | 2 | 34.63 | Township |
| Torgerson township | 6 | 61 | 65 | -1.61% | 2 | 33.15 | Township |
| Balta | 7 | 58 | 62 | -1.69% | 256 | 0.23 | City |
| Reno Valley township | 8 | 47 | 48 | -2.08% | 1 | 34.59 | Township |
| Truman township | 9 | 44 | 39 | 4.76% | 1 | 35.34 | Township |
| Elverum township | 10 | 43 | 44 | 0% | 1 | 32.20 | Township |
| Wolford | 11 | 42 | 44 | 0% | 233 | 0.18 | City |
| Jefferson township | 12 | 42 | 43 | 0% | 1 | 35.06 | Township |
| White township | 13 | 42 | 43 | 0% | 1 | 34.49 | Township |
| Elling township | 14 | 40 | 41 | 0% | 1 | 34.20 | Township |
| Rush Lake township | 15 | 39 | 40 | 0% | 1 | 34.82 | Township |
| Balta township | 16 | 32 | 33 | 0% | 1 | 33.95 | Township |
| Alexanter township | 17 | 29 | 30 | 0% | 1 | 35.17 | Township |
| Antelope Lake township | 18 | 18 | 21 | -5.26% | 1 | 31.76 | Township |
Rugby is the largest city in Pierce County, with a population of 2,409.
Antelope Lake township is the smallest city in Pierce County.
There are 18 cities in Pierce County, North Dakota.