31 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lincoln | 1 | 12,954 | 13,248 | -0.45% | 2,074 | 6 | City |
| East Lincoln | 2 | 7,588 | 7,746 | -0.35% | 211 | 36 | Township |
| West Lincoln | 3 | 7,251 | 7,386 | -0.3% | 191 | 38 | Township |
| Broadwell | 4 | 3,070 | 3,077 | -0.03% | 93 | 33 | Township |
| Mount Pulaski | 5 | 2,023 | 2,062 | -0.3% | 37 | 54 | Township |
| Atlanta | 6 | 1,858 | 1,897 | -0.32% | 77 | 24 | Township |
| Atlanta | 7 | 1,620 | 1,662 | -0.49% | 1,297 | 1 | City |
| Mount Pulaski | 8 | 1,496 | 1,533 | -0.47% | 1,319 | 1 | City |
| Orvil | 9 | 959 | 986 | -0.52% | 23 | 42 | Township |
| Corwin | 10 | 600 | 608 | -0.17% | 18 | 34 | Township |
| Laenna | 11 | 510 | 519 | -0.2% | 15 | 35 | Township |
| Elkhart | 12 | 504 | 502 | 0.4% | 10 | 52 | Township |
| Aetna | 13 | 455 | 462 | -0.22% | 13 | 35 | Township |
| Emden | 14 | 449 | 464 | -0.66% | 1,911 | 0 | Village |
| Elkhart | 15 | 444 | 451 | -0.22% | 237 | 2 | Village |
| Prairie Creek | 16 | 401 | 409 | -0.25% | 9 | 42 | Township |
| Lincoln | 17 | 391 | 394 | 0% | 11 | 36 | Township |
| Eminence | 18 | 388 | 392 | 0% | 9 | 43 | Township |
| Latham | 19 | 322 | 331 | -0.62% | 1,179 | 0 | Village |
| Middletown | 20 | 320 | 329 | -0.62% | 938 | 0 | Village |
| Hurlbut | 21 | 312 | 320 | -0.64% | 12 | 25 | Township |
| Oran | 22 | 310 | 313 | 0% | 9 | 34 | Township |
| New Holland | 23 | 263 | 272 | -0.75% | 848 | 0 | Village |
| Hartsburg | 24 | 252 | 261 | -0.79% | 1,680 | 0 | Village |
| Chestnut | 25 | 214 | 222 | -0.47% | 6 | 36 | Township |
| Lawndale | 26 | 155 | 159 | -0.64% | 4 | 40 | Township |
| Chestnut | 27 | 152 | 37 | -3.8% | 1,236 | 0 | CDP |
| Beason | 28 | 149 | 201 | -1.97% | 343 | 0 | CDP |
| Broadwell | 29 | 136 | 140 | -0.73% | 756 | 0 | Village |
| Lake Fork | 30 | 115 | 119 | -0.86% | 6 | 18 | Township |
| Cornland | 31 | 58 | 71 | 7.41% | 611 | 0 | CDP |
Lincoln is the largest city in Logan County, with a population of 12,954.
Cornland is the smallest city in Logan County, with a population of 58.
There are 31 cities in Logan County, Illinois.