21 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Albany | 1 | 57,304 | 56,676 | 0.22% | 3,212 | 17.84 | City |
| Lebanon | 2 | 20,527 | 18,524 | 1.99% | 2,873 | 7.15 | City |
| Sweet Home | 3 | 10,439 | 9,856 | 1.13% | 1,967 | 5.31 | City |
| Harrisburg | 4 | 3,729 | 3,659 | 0.38% | 2,673 | 1.40 | City |
| Mill City | 5 | 1,999 | 1,976 | 0.25% | 2,216 | 0.90 | City |
| Brownsville | 6 | 1,949 | 1,698 | 2.63% | 1,451 | 1.34 | City |
| Tangent | 7 | 1,244 | 1,251 | -0.08% | 329 | 3.78 | City |
| Lyons | 8 | 1,206 | 1,208 | 0% | 1,394 | 0.86 | City |
| South Lebanon | 9 | 1,104 | 903 | 0.64% | 942 | 1.17 | CDP |
| Scio | 10 | 955 | 969 | -0.31% | 2,166 | 0.44 | City |
| Halsey | 11 | 945 | 959 | -0.32% | 1,673 | 0.56 | City |
| Lacomb | 12 | 720 | 581 | 1.7% | 181 | 3.98 | CDP |
| Crawfordsville | 13 | 573 | 441 | 2.87% | 298 | 1.92 | CDP |
| Crabtree | 14 | 522 | 443 | 1.56% | 288 | 1.81 | CDP |
| Sodaville | 15 | 372 | 364 | 0.54% | 1,204 | 0.31 | City |
| Holley | 16 | 273 | 368 | -2.5% | 97 | 2.82 | CDP |
| Waterloo | 17 | 224 | 221 | 0.45% | 1,836 | 0.12 | Town |
| Shedd | 18 | 159 | 290 | -1.85% | 105 | 1.51 | CDP |
| Cascadia | 19 | 107 | 107 | -2.73% | 21 | 5.02 | CDP |
| Peoria | 20 | 40 | 216 | 8.11% | 84 | 0.47 | CDP |
| West Scio | 21 | 14 | 37 | -33.33% | 41 | 0.34 | CDP |
Albany is the largest city in Linn County, with a population of 57,304.
West Scio is the smallest city in Linn County.
There are 21 cities in Linn County, Oregon.