16 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Potosi | 1 | 1,849 | 1,876 | -1.02% | 34 | 55 | Township |
| Mound City | 2 | 1,307 | 1,309 | -0.91% | 27 | 49 | Township |
| Pleasanton | 3 | 1,177 | 1,214 | -0.68% | 543 | 2 | City |
| Linn Valley | 4 | 1,149 | 963 | 3.33% | 388 | 3 | City |
| Parker | 5 | 1,051 | 1,096 | -0.94% | 41 | 25 | Township |
| La Cygne | 6 | 1,013 | 1,041 | -0.59% | 663 | 2 | City |
| Scott | 7 | 797 | 777 | -0.25% | 13 | 62 | Township |
| Mound City | 8 | 637 | 650 | -0.47% | 551 | 1 | City |
| Paris | 9 | 556 | 542 | -0.18% | 9 | 64 | Township |
| Sheridan | 10 | 468 | 450 | 0% | 11 | 44 | Township |
| Blue Mound | 11 | 434 | 427 | -0.46% | 7 | 63 | Township |
| Parker | 12 | 227 | 236 | -0.87% | 808 | 0 | City |
| Blue Mound | 13 | 219 | 221 | -0.45% | 344 | 1 | City |
| Prescott | 14 | 215 | 205 | 0.94% | 754 | 0 | City |
| Stanton | 15 | 164 | 161 | -0.61% | 6 | 30 | Township |
| Valley | 16 | 109 | 105 | 0% | 3 | 37 | Township |
Potosi is the largest city in Linn County, with a population of 1,849.
Valley is the smallest city in Linn County, with a population of 109.
There are 16 cities in Linn County, Kansas.