Towns
| State | City/Town | Town Title |
|---|---|---|
| Iowa | Dallas Center | Dallas Center, IA |
| Iowa | Dana | Dana, IA |
| Iowa | Danbury | Danbury, IA |
| Iowa | Danville | Danville, IA |
| Iowa | Davenport | Davenport, IA |
| Iowa | Davis City | Davis City, IA |
| Iowa | Dawson | Dawson, IA |
| Iowa | Dayton | Dayton, IA |
| Iowa | De Soto | De Soto, IA |
| Iowa | De Witt | De Witt, IA |
| Iowa | Decatur | Decatur, IA |
| Iowa | Decorah | Decorah, IA |
| Iowa | Dedham | Dedham, IA |
| Iowa | Deep River | Deep River, IA |
| Iowa | Defiance | Defiance, IA |
| Iowa | Delaware | Delaware, IA |
| Iowa | Delhi | Delhi, IA |
| Iowa | Delmar | Delmar, IA |
| Iowa | Deloit | Deloit, IA |
| Iowa | Delta | Delta, IA |
| Iowa | Denison | Denison, IA |
| Iowa | Denmark | Denmark, IA |
| Iowa | Denver | Denver, IA |
| Iowa | Derby | Derby, IA |
| Iowa | Des Moines | Des Moines, IA |