| Middle Bass | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | USA Ohio |
| Pushpin Map Caption: | Location within the state of Ohio |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Ohio |
| Subdivision Type2: | County |
| Subdivision Type3: | Township |
| Subdivision Name3: | Put-in-Bay |
| Unit Pref: | Imperial |
| Population As Of: | 2000 |
| Population Density Km2: | auto |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 581 |
| Coordinates: | 41.6789°N -82.8122°W |
| Postal Code Type: | ZIP codes |
| Postal Code: | 43446 |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1049671 |
Middle Bass is an unincorporated community in Put-in-Bay Township, Ottawa County, Ohio, United States. It is the only community on Middle Bass Island in Lake Erie. It has a post office with the ZIP code 43446.[1]