18 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| River Falls | 1 | 18,173 | 16,198 | 2.08% | 2,508 | 7 | City |
| River Falls | 2 | 18,173 | 16,315 | 2.08% | 2,508 | 7 | City |
| Prescott | 3 | 4,648 | 4,333 | 1.4% | 1,640 | 3 | City |
| Prescott | 4 | 4,648 | 4,327 | 1.4% | 1,640 | 3 | City |
| Ellsworth | 5 | 3,340 | 3,349 | -0.03% | 880 | 4 | Village |
| Ellsworth | 6 | 3,340 | 3,343 | -0.03% | 880 | 4 | Village |
| Spring Valley | 7 | 1,456 | 1,407 | 0.69% | 367 | 4 | Village |
| Spring Valley | 8 | 1,456 | 1,406 | 0.69% | 367 | 4 | Village |
| Elmwood | 9 | 810 | 824 | -0.37% | 535 | 2 | Village |
| Elmwood | 10 | 810 | 822 | -0.37% | 535 | 2 | Village |
| Plum City | 11 | 589 | 598 | -0.34% | 565 | 1 | Village |
| Plum City | 12 | 589 | 597 | -0.34% | 565 | 1 | Village |
| Bay City | 13 | 454 | 443 | 0.44% | 768 | 1 | Village |
| Bay City | 14 | 454 | 444 | 0.44% | 768 | 1 | Village |
| Diamond Bluff | 15 | 213 | 233 | 0.47% | 122 | 2 | CDP |
| Hager City | 16 | 199 | 272 | -4.33% | 103 | 2 | CDP |
| Maiden Rock | 17 | 118 | 116 | 0% | 98 | 1 | Village |
| Maiden Rock | 18 | 118 | 116 | 0% | 98 | 1 | Village |
River Falls is the largest city in Pierce County, with a population of 18,173.
Maiden Rock is the smallest city in Pierce County, with a population of 118.
There are 18 cities in Pierce County, Wisconsin.