30 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Dyer | Lake County | 16,262 |
| Danville | Hendricks County | 13,461 |
| Decatur | Adams County | 10,140 |
| Dunlap | Elkhart County | 6,687 |
| DeMotte | Jasper County | 4,330 |
| Delphi | Carroll County | 3,043 |
| Dunkirk | Jay County | 2,078 |
| Daleville | Delaware County | 1,741 |
| Dale | Spencer County | 1,527 |
| Darmstadt | Vanderburgh County | 1,437 |
| Dillsboro | Dearborn County | 1,396 |
| Dayton | Tippecanoe County | 1,394 |
| Dugger | Sullivan County | 794 |
| Darlington | Montgomery County | 726 |
| Dublin | Wayne County | 675 |
| Dana | Vermillion County | 552 |
| Delaware | 539 | |
| Denver | Miami County | 461 |
| Dubois | Dubois County | 378 |
| Dupont | Jefferson County | 336 |
| Deer Creek | Carroll County | 260 |
| Dune Acres | Porter County | 230 |
| Decker | Knox County | 198 |
| Duneland Beach | 172 | |
| Dunreith | Henry County | 171 |
| Depauw | Harrison County | 121 |
| Donaldson | Marshall County | 54 |
| Dover Hill | Martin County | 52 |
| Dresser | Vigo County | 34 |
| Deputy | Jefferson County | 14 |