8 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Brookfield | 1 | 4,117 | 4,096 | 0.1% | 947 | 4 | City |
| Marceline | 2 | 2,132 | 2,125 | 0.05% | 650 | 3 | City |
| Meadville | 3 | 421 | 415 | 0.24% | 780 | 1 | City |
| Bucklin | 4 | 413 | 410 | 0.24% | 349 | 1 | City |
| Laclede | 5 | 302 | 302 | 0% | 242 | 1 | City |
| Linneus | 6 | 281 | 278 | 0.36% | 264 | 1 | City |
| Browning | 7 | 216 | 218 | 0% | 413 | 1 | City |
| Purdin | 8 | 138 | 140 | 0% | 451 | 0 | City |
Brookfield is the largest city in Linn County, with a population of 4,117.
Purdin is the smallest city in Linn County, with a population of 138.
There are 8 cities in Linn County, Missouri.