| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Marshfield | 1 | 8,190 | 7,494 | 1.39% | 1,483 | 6 | City |
| Rogersville | 2 | 6,112 | 3,897 | 6.22% | 1,615 | 4 | City |
| Seymour | 3 | 1,982 | 1,846 | 1.12% | 569 | 3 | City |
| Fordland | 4 | 832 | 777 | 0.97% | 752 | 1 | City |
| Niangua | 5 | 430 | 398 | 1.18% | 1,049 | 0 | City |
| Diggins | 6 | 322 | 302 | 0.94% | 332 | 1 | Village |
Marshfield is the largest city in Webster County, with a population of 8,190.
Diggins is the smallest city in Webster County, with a population of 322.
There are 6 cities in Webster County, Missouri.