There are 30 cities in Delaware 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) |
|---|---|---|---|---|---|---|---|
| Columbus | 1 | Ohio | 915,427 | 906,418 | 0.25% | 4,147 | 220.72 |
| Dublin | 2 | Ohio | 48,783 | 49,343 | -0.29% | 1,977 | 24.68 |
| Delaware | 3 | Ohio | 46,306 | 41,712 | 2.54% | 2,288 | 20.24 |
| Westerville | 4 | Ohio | 37,529 | 39,244 | -1.13% | 2,978 | 12.60 |
| Hilliard | 5 | Ohio | 37,303 | 37,137 | 0.11% | 2,613 | 14.27 |
| Gahanna | 6 | Ohio | 34,977 | 35,705 | -0.52% | 2,813 | 12.43 |
| Marysville | 7 | Ohio | 29,328 | 25,706 | 3.18% | 1,802 | 16.28 |
| Powell | 8 | Ohio | 14,571 | 14,250 | 0.55% | 2,506 | 5.82 |
| Worthington | 9 | Ohio | 14,400 | 14,786 | -0.67% | 2,633 | 5.47 |
| New Albany | 10 | Ohio | 11,421 | 11,076 | 0.76% | 557 | 20.52 |
| Sunbury | 11 | Ohio | 8,881 | 6,717 | 6.49% | 1,845 | 4.81 |
| Johnstown | 12 | Ohio | 5,350 | 5,190 | 0.75% | 1,792 | 2.98 |
| Huber Ridge | 13 | Ohio | 4,391 | 4,213 | 1.03% | 4,194 | 1.05 |
| Richwood | 14 | Ohio | 2,580 | 2,234 | 3.45% | 2,077 | 1.24 |
| Minerva Park | 15 | Ohio | 1,922 | 2,010 | -1.13% | 2,971 | 0.65 |
| New California | 16 | Ohio | 1,891 | 1,330 | -0.47% | 919 | 2.06 |
| Centerburg | 17 | Ohio | 1,663 | 1,693 | -0.48% | 1,720 | 0.97 |
| Ashley | 18 | Ohio | 1,355 | 1,207 | 2.81% | 2,056 | 0.66 |
| Ostrander | 19 | Ohio | 1,229 | 1,099 | 2.67% | 1,310 | 0.94 |
| Galena | 20 | Ohio | 1,046 | 934 | 2.75% | 605 | 1.73 |
| Prospect | 21 | Ohio | 1,046 | 1,068 | -0.57% | 1,445 | 0.72 |
| Shawnee Hills | 22 | Ohio | 940 | 840 | 2.73% | 2,112 | 0.45 |
| Milford Center | 23 | Ohio | 934 | 809 | 3.43% | 2,213 | 0.42 |
| Hartford (Croton) | 24 | Ohio | 405 | 401 | 0.25% | 758 | 0.53 |
| Waldo | 25 | Ohio | 314 | 321 | -0.63% | 485 | 0.65 |
| Magnetic Springs | 26 | Ohio | 303 | 261 | 3.41% | 1,423 | 0.21 |
| Marengo | 27 | Ohio | 280 | 280 | 0% | 1,667 | 0.17 |
| Radnor | 28 | Ohio | 203 | 131 | 9.73% | 282 | 0.72 |
| Raymond | 29 | Ohio | 155 | 155 | 0% | 122 | 1.27 |
| Kilbourne | 30 | Ohio | 17 | 14 | -19.05% | 38 | 0.45 |
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.
Columbus is the largest city in Delaware County.
Kilbourne is the smallest city in Delaware County.
There are 30 cities in Delaware County, Ohio.