There are 25 cities in Champaign County, Ohio.
Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | State | 2024 Population | 2020 Census | Annual Change | Density (mi²) | Area (mi²) |
|---|---|---|---|---|---|---|---|
| Springfield | 1 | Ohio | 57,622 | 58,590 | -0.42% | 2,163 | 26.64 |
| Huber Heights | 2 | Ohio | 43,201 | 43,441 | -0.14% | 1,946 | 22.20 |
| Sidney | 3 | Ohio | 20,034 | 20,546 | -0.64% | 1,674 | 11.97 |
| Urbana | 4 | Ohio | 11,106 | 11,142 | -0.08% | 1,335 | 8.32 |
| Northridge | 5 | Ohio | 7,443 | 7,318 | -1.54% | 2,430 | 3.06 |
| New Carlisle | 6 | Ohio | 5,462 | 5,558 | -0.44% | 2,037 | 2.68 |
| Park Layne | 7 | Ohio | 3,528 | 4,420 | -5.95% | 2,410 | 1.46 |
| St. Paris | 8 | Ohio | 1,870 | 1,878 | -0.11% | 1,154 | 1.62 |
| West Liberty | 9 | Ohio | 1,752 | 1,766 | -0.17% | 1,440 | 1.22 |
| Mechanicsburg | 10 | Ohio | 1,665 | 1,675 | -0.12% | 1,697 | 0.98 |
| North Lewisburg | 11 | Ohio | 1,643 | 1,641 | 0.06% | 1,530 | 1.07 |
| Crystal Lakes | 12 | Ohio | 1,557 | 1,478 | -1.52% | 3,237 | 0.48 |
| De Graff | 13 | Ohio | 1,248 | 1,250 | 0% | 1,244 | 1 |
| Milford Center | 14 | Ohio | 926 | 810 | 3.23% | 2,194 | 0.42 |
| Quincy | 15 | Ohio | 541 | 539 | 0.18% | 483 | 1.12 |
| Christiansburg | 16 | Ohio | 497 | 505 | -0.4% | 2,088 | 0.24 |
| North Hampton | 17 | Ohio | 447 | 457 | -0.45% | 1,161 | 0.39 |
| Lawrenceville | 18 | Ohio | 351 | 481 | -8.36% | 715 | 0.49 |
| Port Jefferson | 19 | Ohio | 300 | 308 | -0.66% | 1,974 | 0.15 |
| Woodstock | 20 | Ohio | 283 | 291 | -0.7% | 1,000 | 0.28 |
| Casstown | 21 | Ohio | 276 | 270 | 0.73% | 2,845 | 0.10 |
| Rosewood | 22 | Ohio | 274 | 311 | -1.08% | 202 | 1.35 |
| Donnelsville | 23 | Ohio | 254 | 260 | -0.39% | 799 | 0.32 |
| Mutual | 24 | Ohio | 125 | 127 | 0% | 926 | 0.14 |
| Brandt | 25 | Ohio | 111 | 383 | -31.9% | 115 | 0.97 |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Springfield is the largest city in Champaign County.
Brandt is the smallest city in Champaign County.
There are 25 cities in Champaign County, Ohio.