| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Dadsville | city | Ohio | United States | 39.74 | -84.50 | 925 | |
| Daft Subdivision | city | Ohio | United States | 41.57 | -84.56 | 846 | |
| Dague | city | Ohio | United States | 41.06 | -84.58 | 830 | |
| Dairy | city | Ohio | United States | 39.65 | -80.98 | 1197 | |
| Dal-Mar Mobile Home Park | city | Ohio | United States | 39.97 | -83.83 | 951 | |
| Dale | city | Ohio | United States | 39.49 | -81.77 | 830 | |
| Dale Avenue Mobile Home Park | city | Ohio | United States | 40.75 | -82.51 | 1227 | |
| Dalewood | city | Ohio | United States | 39.34 | -84.39 | 859 | |
| Daleyville | city | Ohio | United States | 39.11 | -83.05 | 830 | |
| Dallasburg | city | Ohio | United States | 39.27 | -84.19 | 830 | |
| Dallmans Corner | city | Ohio | United States | 39.18 | -84.43 | 830 | |
| Dalrymple Corners | city | Ohio | United States | 40.40 | -82.61 | 1669 | |
| Dalton | city | Ohio | United States | 40.80 | -81.70 | 1095 | |
| Dalzell | city | Ohio | United States | 39.56 | -81.30 | 954 | |
| Damascus | city | Ohio | United States | 40.90 | -80.96 | 1204 | |
| Damascus (historical) | city | Ohio | United States | 41.41 | -84.02 | 830 | |
| Danbury | city | Ohio | United States | 41.50 | -82.83 | 830 | |
| Danville | city | Ohio | United States | 40.45 | -82.26 | 997 | |
| Danville | city | Ohio | United States | 39.03 | -82.26 | 830 | |
| Danville | city | Ohio | United States | 39.14 | -83.74 | 1023 | |
| Darby Glen | city | Ohio | United States | 40.02 | -83.13 | 882 | |
| Darby Meadows | city | Ohio | United States | 40.16 | -83.32 | 987 | |
| Darby Place Mobile Home Park | city | Ohio | United States | 41.41 | -82.39 | 830 | |
| Darbydale | city | Ohio | United States | 39.85 | -83.18 | 830 | |
| Darbyville | city | Ohio | United States | 39.70 | -83.11 | 830 | |
| Darlington | city | Ohio | United States | 39.88 | -82.03 | 830 | |
| Darlington | city | Ohio | United States | 40.59 | -82.60 | 1669 | |
| Darnell | city | Ohio | United States | 40.07 | -83.94 | 1158 | |
| Darrowville | city | Ohio | United States | 41.20 | -81.44 | 1040 | |
| Darrtown | city | Ohio | United States | 39.50 | -84.66 | 830 | |
| Dart | city | Ohio | United States | 39.49 | -81.27 | 830 | |
| Darwin | city | Ohio | United States | 39.15 | -82.02 | 830 | |
| Davidson Run | city | Ohio | United States | 40.05 | -83.12 | 830 | |
| Davis | city | Ohio | United States | 41.08 | -81.01 | 1000 | |
| Davisville | city | Ohio | United States | 39.10 | -82.61 | 830 | |
| Dawn | city | Ohio | United States | 40.22 | -84.58 | 997 | |
| Dawson | city | Ohio | United States | 40.26 | -84.32 | 948 | |
| Dawsons Mobile Home Park | city | Ohio | United States | 38.99 | -83.02 | 830 | |
| Day Heights | city | Ohio | United States | 39.17 | -84.23 | 846 | |
| Days Mobile Home Park | city | Ohio | United States | 38.77 | -83.03 | 830 | |
| Dayton | city | Ohio | United States | 39.76 | -84.19 | 830 | |
| Daytonview | city | Ohio | United States | 39.77 | -84.21 | 830 |