6 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Marshfield | 1 | 8,158 | 7,488 | 1.39% | 1,478 | 6 | City |
| Rogersville | 2 | 6,067 | 3,898 | 6.35% | 1,603 | 4 | City |
| Seymour | 3 | 1,977 | 1,848 | 1.13% | 567 | 3 | City |
| Fordland | 4 | 825 | 777 | 0.98% | 746 | 1 | City |
| Niangua | 5 | 424 | 394 | 1.19% | 1,034 | 0 | City |
| Diggins | 6 | 318 | 302 | 0.95% | 328 | 1 | Village |
Marshfield is the largest city in Webster County, with a population of 8,158.
Diggins is the smallest city in Webster County, with a population of 318.
There are 6 cities in Webster County, Missouri.