| Ottoville High School | |
| Streetaddress: | 650 W. Third St. |
| County: | (Putnam County) |
| Zipcode: | 45876 |
| Country: | USA |
| Coordinates: | 40.9335°N -84.3462°W |
| Superintendent: | Jarrod Wehri[1] |
| Principal: | Jon Thorbahn |
| Teaching Staff: | 16.56 (FTE) |
| Ratio: | 10.57 |
| Rival: | Kalida High School |
| Mascot: | Trojan |
| Sports: | Basketball, Baseball, Soccer, Track, Cross Country, Volleyball, Softball, Golf, Table Tennis, Lacrosse |
| Team Name: | Big Green |
| Nickname: | Big Green[2] |
| Colors: | Green & Gold |
| Enrollment: | 175 (2018–19)[3] |
Ottoville High School is a public high school in Ottoville, Ohio. It is the only high school in the Ottoville Local School district. Their nickname is the Big Green. They are a member of the Putnam County League.