12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Montello | 1 | 1,435 | 1,443 | -0.14% | 730 | 2 | City |
| Montello | 2 | 1,435 | 1,442 | -0.14% | 730 | 2 | City |
| Westfield | 3 | 1,303 | 1,304 | 0% | 829 | 2 | Village |
| Westfield | 4 | 1,303 | 1,303 | 0% | 829 | 2 | Village |
| Oxford | 5 | 533 | 536 | -0.19% | 635 | 1 | Village |
| Oxford | 6 | 533 | 535 | -0.19% | 635 | 1 | Village |
| Endeavor | 7 | 433 | 433 | 0% | 686 | 1 | Village |
| Endeavor | 8 | 433 | 433 | 0% | 686 | 1 | Village |
| Neshkoro | 9 | 409 | 412 | -0.24% | 203 | 2 | Village |
| Neshkoro | 10 | 409 | 412 | -0.24% | 203 | 2 | Village |
| Briggsville | 11 | 363 | 303 | 7.4% | 230 | 2 | CDP |
| Packwaukee | 12 | 194 | 194 | -2.51% | 404 | 0 | CDP |
Montello is the largest city in Marquette County, with a population of 1,435.
Packwaukee is the smallest city in Marquette County, with a population of 194.
There are 12 cities in Marquette County, Wisconsin.