| Robert S. Alexander High School | |
| Streetaddress: | 6500 Alexander Pkwy. |
| City: | Douglasville |
| State: | Georgia |
| Zipcode: | 30135-3596 |
| Country: | USA |
| Coordinates: | 33.6815°N -84.7905°W[1] |
| District: | Douglas County School District |
| Principal: | Christopher Small |
| Teaching Staff: | 103.30 [2] |
| Ceeb: | 111104 |
| Ratio: | 17.70 |
| Schooltype: | Public |
| Grades: | 9-12 |
| Athletics: | GHSA AAAAAA |
| Mascot: | Cougar |
| Colors: | Red and black |
| Yearbook: | The Catamount |
| Newspaper: | The Ant Hill Scrolls |
| Established: | 1986 |
| Enrollment: | 1,823 (as of 2022-23) |
| Homepage: | Alexander HS |
Robert S. Alexander High School is a public high school in Douglasville, Georgia, United States. It is the third high school to open in the Douglas County School District.
Originally built to relieve overpopulation between Douglas County High School and Lithia Springs High School, Alexander High School opened for the 1986–1987 school year. The school's namesake, Robert S. Alexander, was a long-time employee of the Douglas County School System.[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.In the 2021-2022 school year a student was stabbed.[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.