| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Blachleyville | city | Ohio | United States | 40.76 | -82.08 | 1003 | |
| Black | city | Ohio | United States | 40.05 | -81.59 | 846 | |
| Black Horse | city | Ohio | United States | 41.16 | -81.27 | 1092 | |
| Black Run | city | Ohio | United States | 40.10 | -82.17 | 830 | |
| Blackband | city | Ohio | United States | 40.43 | -81.54 | 1072 | |
| Blackberry Corner | city | Ohio | United States | 41.60 | -83.28 | 830 | |
| Blackbrook Valley Estates | city | Ohio | United States | 41.27 | -81.15 | 1161 | |
| Blackburn (historical) | city | Ohio | United States | 39.54 | -82.64 | 1010 | |
| Blackfork | city | Ohio | United States | 38.84 | -82.60 | 830 | |
| Blackfork Junction | city | Ohio | United States | 38.86 | -82.60 | 830 | |
| Blackhawk | city | Ohio | United States | 39.32 | -84.07 | 839 | |
| Blackhawk Mobile Home Park | city | Ohio | United States | 40.51 | -83.92 | 987 | |
| Blackjack | city | Ohio | United States | 39.47 | -82.49 | 974 | |
| Blacklick | city | Ohio | United States | 40.00 | -82.81 | 935 | |
| Blacklick Estates | city | Ohio | United States | 39.91 | -82.86 | 830 | |
| Blacklick Ridge | city | Ohio | United States | 39.99 | -82.80 | 954 | |
| Blacktop | city | Ohio | United States | 39.98 | -81.48 | 997 | |
| Bladen | city | Ohio | United States | 38.66 | -82.19 | 830 | |
| Bladensburg | city | Ohio | United States | 40.28 | -82.28 | 997 | |
| Blaine | city | Ohio | United States | 40.07 | -80.82 | 869 | |
| Blainesville | city | Ohio | United States | 40.12 | -80.89 | 898 | |
| Blair Modern Trailer Court | city | Ohio | United States | 39.20 | -83.61 | 1043 | |
| Blairmont | city | Ohio | United States | 40.24 | -80.89 | 997 | |
| Blairsville | city | Ohio | United States | 38.99 | -84.29 | 830 | |
| Blake | city | Ohio | United States | 41.05 | -81.82 | 1190 | |
| Blakeslee | city | Ohio | United States | 41.52 | -84.73 | 846 | |
| Blanchard | city | Ohio | United States | 40.73 | -83.64 | 898 | |
| Blanchard (historical) | city | Ohio | United States | 40.11 | -82.49 | 997 | |
| Blanchester | city | Ohio | United States | 39.29 | -83.99 | 958 | |
| Blanchester Mobile Home Park | city | Ohio | United States | 39.30 | -83.98 | 980 | |
| Blanco | city | Ohio | United States | 41.09 | -80.96 | 997 | |
| Blatchford | city | Ohio | United States | 39.52 | -82.20 | 830 | |
| Blendon Corner | city | Ohio | United States | 40.08 | -82.93 | 830 | |
| Blennerhassett View | city | Ohio | United States | 39.28 | -81.62 | 830 | |
| Blessing | city | Ohio | United States | 39.70 | -83.60 | 1099 | |
| Blissfield | city | Ohio | United States | 40.40 | -81.97 | 997 | |
| Blocktown (historical) | city | Ohio | United States | 40.75 | -83.69 | 928 | |
| Bloody Corners | city | Ohio | United States | 41.12 | -81.12 | 1118 | |
| Bloom Center | city | Ohio | United States | 40.42 | -83.95 | 997 | |
| Bloom Center | city | Ohio | United States | 41.21 | -83.59 | 830 | |
| Bloom Junction | city | Ohio | United States | 38.81 | -82.69 | 830 | |
| Bloom Rose (historical) | city | Ohio | United States | 39.10 | -84.00 | 948 | |
| Bloomdale | city | Ohio | United States | 41.17 | -83.56 | 830 | |
| Bloomer | city | Ohio | United States | 40.19 | -84.41 | 997 | |
| Bloomfield | city | Ohio | United States | 40.05 | -81.74 | 1099 | |
| Bloomfield | city | Ohio | United States | 40.36 | -82.72 | 1669 | |
| Bloomfield | city | Ohio | United States | 39.56 | -81.20 | 830 | |
| Blooming Grove | city | Ohio | United States | 40.71 | -82.72 | 1669 | |
| Bloomingburg | city | Ohio | United States | 39.61 | -83.40 | 990 | |
| Bloomingburg Mobile Home Park | city | Ohio | United States | 39.61 | -83.39 | 990 | |
| Bloomingdale | city | Ohio | United States | 40.34 | -80.82 | 1207 | |
| Bloomington | city | Ohio | United States | 39.54 | -83.71 | 1099 | |
| Bloomingville | city | Ohio | United States | 41.36 | -82.73 | 830 | |
| Bloomville | city | Ohio | United States | 41.05 | -83.01 | 921 | |
| Blowville | city | Ohio | United States | 39.10 | -84.04 | 898 | |
| Blue Ash | city | Ohio | United States | 39.23 | -84.38 | 830 | |
| Blue Ball | city | Ohio | United States | 39.49 | -84.34 | 830 | |
| Blue Creek | city | Ohio | United States | 38.78 | -83.33 | 830 | |
| Blue Jay | city | Ohio | United States | 39.23 | -84.74 | 830 | |
| Blue Rock | city | Ohio | United States | 39.80 | -81.89 | 830 | |
| Blue Row | city | Ohio | United States | 40.19 | -81.86 | 977 | |
| Blue Valley Acres | city | Ohio | United States | 39.64 | -82.56 | 830 | |
| Blue Water Manor | city | Ohio | United States | 41.17 | -80.92 | 925 | |
| Bluebell | city | Ohio | United States | 39.90 | -81.59 | 977 | |
| Bluebird Beach | city | Ohio | United States | 41.42 | -82.38 | 830 | |
| Bluestone | city | Ohio | United States | 41.53 | -81.55 | 875 | |
| Bluff (historical) | city | Ohio | United States | 40.35 | -82.12 | 1056 | |
| Bluffton | city | Ohio | United States | 40.90 | -83.89 | 830 |