Towns
| State | City/Town | Town Title |
|---|---|---|
| Iowa | Dewar | Dewar, IA |
| Iowa | Dexter | Dexter, IA |
| Iowa | Diagonal | Diagonal, IA |
| Iowa | Dickens | Dickens, IA |
| Iowa | Dike | Dike, IA |
| Iowa | Dixon | Dixon, IA |
| Iowa | Dolliver | Dolliver, IA |
| Iowa | Donahue | Donahue, IA |
| Iowa | Donnellson | Donnellson, IA |
| Iowa | Doon | Doon, IA |
| Iowa | Dorchester | Dorchester, IA |
| Iowa | Doris | Doris, IA |
| Iowa | Douds | Douds, IA |
| Iowa | Dougherty | Dougherty, IA |
| Iowa | Dow City | Dow City, IA |
| Iowa | Dows | Dows, IA |
| Iowa | Drakesville | Drakesville, IA |
| Iowa | Dubuque | Dubuque, IA |
| Iowa | Dumont | Dumont, IA |
| Iowa | Duncombe | Duncombe, IA |
| Iowa | Dundee | Dundee, IA |
| Iowa | Dunkerton | Dunkerton, IA |
| Iowa | Dunlap | Dunlap, IA |
| Iowa | Durango | Durango, IA |
| Iowa | Durant | Durant, IA |