The Alton Middle School is housed in the old Alton High School complex. Alton Middle School serves grades 6–8. The school is made up of three buildings: the main building, annex, and Olin Building. The Main building is the oldest. It is of architectural interest for its Romanesque design. Alton Middle School is the largest middle school in Illinois, with approximately 1,500 students.
The Alton Middle School is housed in the old Alton High School complex. Alton Middle School serves grades 6–8. The school is made up of three buildings: the main building, annex, and Olin Building The Main building is the oldest It is of architectural interest for its Romanesque design. Alton Middle School is the largest middle school in Illinois, with approximately 1,500 students.