The current headmaster at The Walker School, a private school similar to Augusta Prep but about twice its size, plans to retire at the end of the school year.
Both Hall and his wife, Cathy, a middle school English teacher at Augusta Prep, are from the Atlanta area.
Cathy Hall and daughter Alice, a junior, will remain for one more school year.
"She started here in kindergarten and loves it here," Jack Hall said. She wouldn't want to graduate from anyplace else."
A search committee to replace him has been formed by the school's board of directors.