| Gallia Academy High School | |
| Streetaddress: | 2855 Centenary Road |
| City: | Gallipolis |
| State: | Ohio |
| County: | (Gallia County) |
| Zipcode: | 45631 |
| Country: | USA |
| Coordinates: | 38.8047°N -82.2625°W |
| District: | Gallipolis City School District |
| Superintendent: | Craig Wright |
| Principal: | Josh Donley |
| Type: | Public high school |
| Grades: | 9-12 |
| Conference: | Ohio Valley Conference |
| Fightsong: | GAHS Fight Song |
| Accreditation: | North Central Association of Colleges and Schools[1] |
| Rivals: | River Valley Raiders Fairland Dragons Point Pleasant Black Knights |
| Team Name: | Blue Devils[2] |
| Homepage: | School website |
Gallia Academy High School (GAHS) is a public high school near Gallipolis at Centenary, Ohio, United States. It is the only high school in the Gallipolis City School District. The boys' sports teams are known as the Blue Devils, while the girls' teams are called the Blue Angels.
GAHS was founded as a conscript school. in 1811. The first official location was constructed in 1936. The original high school building was converted to a junior high school after construction of new facilities in the 1950s.
In 2005, the local community voted and approved a proposal to build a new campus on Centenary Road outside of downtown Gallipolis. The current Gallia Academy High School was completed in 2009 and has been in use since August 24, 2009.
The Gallipolis Gallia Academy Blue Devils will be a part of the Ohio Valley Conference, starting in 2016-17.