14 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Berlin | 1 | 5,615 | 5,577 | 0.14% | 949 | 6 | City |
| Berlin | 2 | 5,615 | 5,575 | 0.14% | 949 | 6 | City |
| Markesan | 3 | 1,386 | 1,381 | 0.07% | 596 | 2 | City |
| Markesan | 4 | 1,386 | 1,380 | 0.07% | 596 | 2 | City |
| Princeton | 5 | 1,271 | 1,267 | 0.08% | 820 | 2 | City |
| Princeton | 6 | 1,271 | 1,266 | 0.08% | 820 | 2 | City |
| Green Lake | 7 | 1,048 | 1,022 | 0.48% | 563 | 2 | City |
| Green Lake | 8 | 1,048 | 1,021 | 0.48% | 563 | 2 | City |
| Kingston | 9 | 286 | 283 | 0% | 219 | 1 | Village |
| Kingston | 10 | 286 | 283 | 0% | 219 | 1 | Village |
| Dalton | 11 | 227 | 203 | 0.44% | 506 | 0 | CDP |
| Marquette | 12 | 172 | 171 | 0% | 457 | 0 | Village |
| Marquette | 13 | 172 | 171 | 0% | 457 | 0 | Village |
| Harrisville | 14 | 166 | 170 | 7.1% | 221 | 1 | CDP |
Berlin is the largest city in Green Lake County, with a population of 5,615.
Harrisville is the smallest city in Green Lake County, with a population of 166.
There are 14 cities in Green Lake County, Wisconsin.