| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Cedar Rapids | 1 | 137,727 | 137,853 | -0.15% | 1,842 | 75 | City |
| Marion | 2 | 42,927 | 41,571 | 0.46% | 2,374 | 18 | City |
| Hiawatha | 3 | 7,465 | 7,180 | 0.44% | 1,567 | 5 | City |
| Mount Vernon | 4 | 4,502 | 4,541 | -0.27% | 1,206 | 4 | City |
| Robins | 5 | 3,360 | 3,361 | -0.18% | 560 | 6 | City |
| Fairfax | 6 | 2,942 | 2,851 | 0.58% | 811 | 4 | City |
| Center Point | 7 | 2,566 | 2,581 | -0.23% | 941 | 3 | City |
| Ely | 8 | 2,368 | 2,343 | 0.08% | 1,405 | 2 | City |
| Lisbon | 9 | 2,238 | 2,229 | -0.04% | 1,052 | 2 | City |
| Palo | 10 | 1,584 | 1,411 | 2.13% | 1,323 | 1 | City |
| Central City | 11 | 1,248 | 1,265 | -0.4% | 1,162 | 1 | City |
| Springville | 12 | 1,157 | 1,162 | -0.26% | 479 | 2 | City |
| Coggon | 13 | 684 | 702 | -0.58% | 963 | 1 | City |
| Alburnett | 14 | 674 | 675 | -0.15% | 892 | 1 | City |
| Walker | 15 | 669 | 685 | -0.74% | 893 | 1 | City |
| Bertram | 16 | 266 | 268 | -0.37% | 173 | 2 | City |
| Prairieburg | 17 | 155 | 157 | -0.64% | 346 | 0 | City |
Cedar Rapids is the largest city in Linn County, with a population of 137,727.
Prairieburg is the smallest city in Linn County, with a population of 155.
There are 17 cities in Linn County, Iowa.