| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Monroe | 1 | 10,571 | 10,633 | -0.09% | 1,757 | 6 | City |
| Brodhead | 2 | 3,206 | 3,264 | -0.25% | 1,786 | 2 | City |
| New Glarus | 3 | 2,266 | 2,280 | 0% | 1,255 | 2 | Village |
| Brooklyn | 4 | 1,549 | 1,523 | 0.13% | 1,386 | 1 | Village |
| Monticello | 5 | 1,171 | 1,185 | -0.17% | 982 | 1 | Village |
| Albany | 6 | 1,085 | 1,108 | -0.37% | 854 | 1 | Village |
| Browntown | 7 | 242 | 242 | 0% | 230 | 1 | Village |
Monroe is the largest city in Green County, with a population of 10,571.
Browntown is the smallest city in Green County, with a population of 242.
There are 7 cities in Green County, Wisconsin.