Antietam Academy is a public high school and middle school in Hagerstown, Washington County, Maryland, United States.

The school consists of an alternative program specializing in behavioral as well as academic disciplines for students in grades 6–12.

In January 2011, its new facility was opened in Hagerstown that is now home to both levels.

After its opening the building, on 40 West Oak Ridge Drive, has become home to other educational programs, including Evening High School and a summer school program.

The High School Assistant Principal is Frank English.