| Zip Code | City | Population ↓ |
|---|---|---|
| 53913 | Baraboo | 21,346 |
| 53959 | Reedsburg | 14,294 |
| 53578 | Prairie Du Sac | 6,392 |
| 53583 | Sauk City | 6,123 |
| 53588 | Spring Green | 3,741 |
| 53941 | La Valle | 3,144 |
| 53951 | North Freedom | 2,466 |
| 53561 | Merrimac | 1,891 |
| 53577 | Plain | 1,300 |
| 53943 | Loganville | 1,284 |
| 53937 | Hillpoint | 1,069 |
| 53961 | Rock Springs | 922 |
| 53942 | Lime Ridge | 142 |
| 53940 | Lake Delton | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 14 ZCTAs in Sauk County, Wisconsin (US Census).