17 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Cedar Rapids | 1 | 134,758 | 137,758 | -0.44% | 1,817 | 74.16 | City |
| Marion | 2 | 42,622 | 41,599 | 0.48% | 2,386 | 17.87 | City |
| Hiawatha | 3 | 7,241 | 7,186 | 0.15% | 1,520 | 4.76 | City |
| Mount Vernon | 4 | 4,558 | 4,542 | 0.07% | 1,304 | 3.50 | City |
| Robins | 5 | 3,275 | 3,367 | -0.55% | 546 | 6 | City |
| Fairfax | 6 | 2,938 | 2,853 | 0.58% | 874 | 3.36 | City |
| Center Point | 7 | 2,525 | 2,584 | -0.47% | 982 | 2.57 | City |
| Ely | 8 | 2,336 | 2,333 | 0.04% | 1,386 | 1.69 | City |
| Lisbon | 9 | 2,192 | 2,232 | -0.36% | 1,031 | 2.13 | City |
| Palo | 10 | 1,569 | 1,409 | 2.08% | 1,311 | 1.20 | City |
| Central City | 11 | 1,223 | 1,267 | -0.73% | 1,139 | 1.07 | City |
| Springville | 12 | 1,138 | 1,162 | -0.44% | 704 | 1.62 | City |
| Coggon | 13 | 674 | 703 | -0.88% | 949 | 0.71 | City |
| Alburnett | 14 | 661 | 675 | -0.45% | 874 | 0.76 | City |
| Walker | 15 | 657 | 684 | -0.76% | 877 | 0.75 | City |
| Bertram | 16 | 265 | 270 | -0.38% | 173 | 1.53 | City |
| Prairieburg | 17 | 153 | 157 | -0.65% | 342 | 0.45 | City |
Cedar Rapids is the largest city in Linn County, with a population of 134,758.
Prairieburg is the smallest city in Linn County.
There are 17 cities in Linn County, Iowa.