The Milledgeville YDC is the state's oldest detention facility for juvenile offenders. It employs more than 300 people, and state officials say closing it will save $18.5 million.
Milledgeville Mayor Richard Bentley says he's "extremely disappointed" by the board's decision.
Bentley said he will talk to state Sen. Johnny Grant, R-Milledgeville, about appealing the decision to Gov. Sonny Perdue.