12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Marshfield | 1 | 8,046 | 7,458 | 1.4% | 1,457 | 6 | City |
| Marshfield | 2 | 8,046 | 7,488 | 1.4% | 1,457 | 6 | City |
| Rogersville | 3 | 5,705 | 3,881 | 6.76% | 1,507 | 4 | City |
| Rogersville | 4 | 5,705 | 3,898 | 6.76% | 1,507 | 4 | City |
| Seymour | 5 | 1,955 | 1,843 | 1.09% | 561 | 3 | City |
| Seymour | 6 | 1,955 | 1,848 | 1.09% | 561 | 3 | City |
| Fordland | 7 | 817 | 775 | 0.99% | 739 | 1 | City |
| Fordland | 8 | 817 | 777 | 0.99% | 739 | 1 | City |
| Niangua | 9 | 419 | 393 | 1.21% | 1,022 | 0 | City |
| Niangua | 10 | 419 | 394 | 1.21% | 1,022 | 0 | City |
| Diggins | 11 | 315 | 301 | 0.64% | 325 | 1 | Village |
| Diggins | 12 | 315 | 302 | 0.64% | 325 | 1 | Village |
Marshfield is the largest city in Webster County, with a population of 8,046.
Diggins is the smallest city in Webster County, with a population of 315.
There are 12 cities in Webster County, Missouri.