| Margaretta High School | |
| Streetaddress: | 209 Lowell Street |
| City: | Castalia |
| State: | Ohio |
| County: | (Erie County) |
| Zipcode: | 44824 |
| Country: | USA |
| Coordinates: | 41.3992°N -82.8014°W |
| Superintendent: | Ed Kurt |
| Principal: | Jennifer Theis |
| Teaching Staff: | 30.25 (FTE) |
| Ratio: | 18.45 |
| Type: | Public, coeducational high school |
| Grades: | 6-12 |
| Athletics: | 12 sports |
| Conference: | Sandusky Bay Conference |
| Rival: | Perkins High School, Clyde High School, Huron High School, Edison High School |
| Mascot: | Polar Bear |
| Sports: | Cross Country, Football, Golf, Wrestling, Basketball, Swimming, Track and Field, Baseball, Softball |
| Team Name: | Polar Bears[1] |
| Yearbook: | Polaris |
| Newspaper: | Polar Press |
| Enrollment: | 558 (2022-23)[2] |
| Communities: | Bay Bridge, Bay View, Castalia, Crystal Rock, Margaretta Township, Parkertown, Townsend Township, Vickery, Whites Landing |
| Feeders: | Margaretta Elementary School, Margaretta Middle School |
| Homepage: | http://www.margaretta.k12.oh.us |
Margaretta High School is a public high school in Castalia, Ohio. It is the only high school in the Margaretta Local Schools district. They are members of the Sandusky Bay Conference.
(years marked with an asterisk (*) denote a shared title)
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