In 1965, the present Marshalltown High School building opened and has experienced minor additions including a library, weightroom, auditorium and classroom wings.

The Marshalltown High School athletics facilities include both outdoor and indoor sports accommodations.

The indoor facilities include a swimming pool, and a gymnasium, known as the "Roundhouse", which has accommodations for basketball, volleyball, wrestling, and track.

All areas are served by concessions, restrooms, parking and men's and women's locker rooms.

[5] [6] Students at Marshalltown High School have a wide array of co-curricular and extra-curricular activities to choose from, including athletics, National Honor Society, Key Club, music, speech, drama, foreign language clubs, color guard and cheer.