Marietta High School (MHS) is a four-year, public, secondary school in Marietta, Ohio, United States. The school serves students in the Marietta City School District in grades nine through twelve. As of 2010-2011, the approximate enrollment was 1,050. Marietta's mascot is Tabby the tiger and its colors are orange and black. The school's rival is Warren High School. The school participates in the East Central Ohio League within the Scarlet Division.