17 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Cedar Rapids | 1 | 137,927 | 137,857 | 0.01% | 1,844 | 75 | City |
| Marion | 2 | 43,026 | 41,574 | 0.57% | 2,380 | 18 | City |
| Hiawatha | 3 | 7,430 | 7,180 | 0.57% | 1,559 | 5 | City |
| Mount Vernon | 4 | 4,506 | 4,542 | -0.13% | 1,207 | 4 | City |
| Robins | 5 | 3,360 | 3,366 | -0.03% | 560 | 6 | City |
| Fairfax | 6 | 2,980 | 2,851 | 0.74% | 822 | 4 | City |
| Center Point | 7 | 2,575 | 2,584 | -0.04% | 944 | 3 | City |
| Ely | 8 | 2,384 | 2,344 | 0.29% | 1,414 | 2 | City |
| Lisbon | 9 | 2,242 | 2,230 | 0.09% | 1,054 | 2 | City |
| Palo | 10 | 1,627 | 1,408 | 2.33% | 1,359 | 1 | City |
| Central City | 11 | 1,248 | 1,265 | -0.24% | 1,162 | 1 | City |
| Springville | 12 | 1,160 | 1,163 | 0% | 481 | 2 | City |
| Coggon | 13 | 685 | 702 | -0.44% | 965 | 1 | City |
| Alburnett | 14 | 670 | 675 | -0.15% | 886 | 1 | City |
| Walker | 15 | 664 | 685 | -0.45% | 887 | 1 | City |
| Bertram | 16 | 266 | 268 | 0% | 173 | 2 | City |
| Prairieburg | 17 | 156 | 156 | 0% | 348 | 0 | City |
Cedar Rapids is the largest city in Linn County, with a population of 137,927.
Prairieburg is the smallest city in Linn County, with a population of 156.
There are 17 cities in Linn County, Iowa.