| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Brookfield | 1 | 4,084 | 4,095 | 0.02% | 939 | 4 | City |
| Marceline | 2 | 2,116 | 2,129 | 0% | 645 | 3 | City |
| Meadville | 3 | 413 | 415 | 0% | 765 | 1 | City |
| Bucklin | 4 | 410 | 412 | 0% | 347 | 1 | City |
| Laclede | 5 | 299 | 303 | -0.33% | 239 | 1 | City |
| Linneus | 6 | 277 | 278 | 0% | 260 | 1 | City |
| Browning | 7 | 215 | 218 | -0.46% | 411 | 1 | City |
| Purdin | 8 | 138 | 140 | 0% | 451 | 0 | City |
Brookfield is the largest city in Linn County, with a population of 4,084.
Purdin is the smallest city in Linn County, with a population of 138.
There are 8 cities in Linn County, Missouri.