Robert S. Alexander High School is a public high school in Douglasville, Georgia, United States.

[3] Due to high Advanced Placement enrollment and high test scores, Alexander High School was chosen as one of 100 schools worldwide for AP Capstone[4] beginning in 2014.

[5] Alexander High School teams are known as the Alexander Cougars and compete in the Georgia High School Association AAAAAA classification.

The boys' cross country team won the 2000 AAAA and the 2016 AAAAAA state championships.

[6] The ALX Wrestling team has won the traditional state titles in 2010 and 2017, as well as the Dual State title is 2017.