12 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Baraboo | 1 | 13,375 | 12,537 | 1.06% | 1,769 | 8 | City |
| Reedsburg | 2 | 10,439 | 10,064 | 0.61% | 1,715 | 6 | City |
| Lake Delton | 3 | 3,447 | 3,504 | -0.26% | 450 | 8 | Village |
| Sauk City | 4 | 3,447 | 3,518 | -0.35% | 2,150 | 2 | Village |
| Spring Green | 5 | 1,579 | 1,560 | 0.19% | 947 | 2 | Village |
| Plain | 6 | 716 | 745 | -0.69% | 788 | 1 | Village |
| North Freedom | 7 | 568 | 601 | -0.87% | 678 | 1 | Village |
| Merrimac | 8 | 529 | 520 | 0.38% | 643 | 1 | Village |
| Rock Springs | 9 | 364 | 324 | 1.96% | 280 | 1 | Village |
| La Valle | 10 | 328 | 388 | -2.96% | 824 | 0 | Village |
| Loganville | 11 | 287 | 299 | -0.69% | 1,083 | 0 | Village |
| Lime Ridge | 12 | 153 | 161 | -0.65% | 153 | 1 | Village |
Baraboo is the largest city in Sauk County, with a population of 13,375.
Lime Ridge is the smallest city in Sauk County, with a population of 153.
There are 12 cities in Sauk County, Wisconsin.