| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Reading | city | Ohio | United States | 39.22 | -84.44 | 830 | |
| Reading | city | Ohio | United States | 40.84 | -81.03 | 1197 | |
| Recks Trailer Park | city | Ohio | United States | 40.17 | -84.26 | 898 | |
| Red Bank | city | Ohio | United States | 39.14 | -84.40 | 830 | |
| Red Diamond | city | Ohio | United States | 39.25 | -82.43 | 830 | |
| Red Lion | city | Ohio | United States | 39.49 | -84.25 | 898 | |
| Red Oak Mobile Home Park | city | Ohio | United States | 39.78 | -84.02 | 898 | |
| Red River | city | Ohio | United States | 40.08 | -84.45 | 997 | |
| Redbird | city | Ohio | United States | 41.82 | -81.08 | 830 | |
| Redbush | city | Ohio | United States | 39.27 | -81.70 | 830 | |
| Redfield | city | Ohio | United States | 39.79 | -82.17 | 898 | |
| Redhaw | city | Ohio | United States | 40.90 | -82.16 | 997 | |
| Redoak | city | Ohio | United States | 38.81 | -83.79 | 898 | |
| Redtown | city | Ohio | United States | 39.47 | -82.09 | 830 | |
| Reeds | city | Ohio | United States | 38.78 | -83.91 | 830 | |
| Reeds (historical) | city | Ohio | United States | 39.41 | -82.64 | 830 | |
| Reeds Mill | city | Ohio | United States | 40.36 | -80.75 | 895 | |
| Reeds Run | city | Ohio | United States | 40.53 | -81.43 | 898 | |
| Reedsburg | city | Ohio | United States | 40.81 | -82.11 | 1082 | |
| Reedsville | city | Ohio | United States | 39.12 | -81.75 | 830 | |
| Reedtown | city | Ohio | United States | 41.15 | -82.85 | 849 | |
| Reedurban | city | Ohio | United States | 40.79 | -81.44 | 1095 | |
| Reese | city | Ohio | United States | 39.87 | -82.95 | 830 | |
| Reese's Mobile Home Park (historical) | city | Ohio | United States | 40.73 | -84.12 | 869 | |
| Reesville | city | Ohio | United States | 39.48 | -83.68 | 1076 | |
| Reform | city | Ohio | United States | 40.14 | -82.25 | 974 | |
| Regina Heights | city | Ohio | United States | 39.82 | -84.27 | 921 | |
| Rehm | city | Ohio | United States | 39.06 | -82.96 | 830 | |
| Rehoboth | city | Ohio | United States | 41.22 | -83.40 | 830 | |
| Rehoboth | city | Ohio | United States | 39.74 | -82.19 | 902 | |
| Reids (historical) | city | Ohio | United States | 41.19 | -84.55 | 830 | |
| Reily | city | Ohio | United States | 39.43 | -84.76 | 830 | |
| Reinersville | city | Ohio | United States | 39.69 | -81.66 | 830 | |
| Relief | city | Ohio | United States | 39.59 | -81.69 | 830 | |
| Relief (historical) | city | Ohio | United States | 41.07 | -82.80 | 915 | |
| Reminderville | city | Ohio | United States | 41.35 | -81.40 | 1023 | |
| Remington | city | Ohio | United States | 39.23 | -84.32 | 830 | |
| Rempel | city | Ohio | United States | 38.94 | -82.52 | 830 | |
| Remsen Corners | city | Ohio | United States | 41.19 | -81.74 | 1049 | |
| Rendcomb Junction | city | Ohio | United States | 39.13 | -84.41 | 830 | |
| Rendville | city | Ohio | United States | 39.62 | -82.09 | 830 | |
| Renick | city | Ohio | United States | 39.30 | -82.95 | 830 | |
| Renick Junction | city | Ohio | United States | 39.31 | -82.93 | 830 | |
| Reno | city | Ohio | United States | 39.37 | -81.40 | 830 | |
| Reno Beach | city | Ohio | United States | 41.66 | -83.27 | 830 | |
| Renollet (historical) | city | Ohio | United States | 41.25 | -84.50 | 830 | |
| Renrock | city | Ohio | United States | 39.76 | -81.67 | 830 | |
| Republic | city | Ohio | United States | 41.12 | -83.02 | 869 | |
| Resaca | city | Ohio | United States | 40.05 | -83.39 | 961 | |
| Residence Park | city | Ohio | United States | 39.76 | -84.26 | 843 | |
| Rest-over Trailer Park | city | Ohio | United States | 39.67 | -82.56 | 830 | |
| Revenge | city | Ohio | United States | 39.60 | -82.65 | 1072 | |
| Rex Hill Mobile Home Park | city | Ohio | United States | 40.98 | -81.56 | 997 | |
| Rexford | city | Ohio | United States | 40.32 | -80.95 | 1099 | |
| Reynolds | city | Ohio | United States | 41.66 | -81.38 | 830 | |
| Reynolds Corners | city | Ohio | United States | 41.65 | -83.66 | 830 | |
| Reynolds Road Cottage Area | city | Ohio | United States | 40.13 | -81.17 | 997 | |
| Reynoldsburg | city | Ohio | United States | 39.95 | -82.81 | 882 |