Episcopal Academy is a Private School that was mentioned in Deadly.
Later in the novel, Aria heads to journalism class and is interrupted by Sean Ackard giving her a Rosewood Episcopal Youth Group Counseling for Troubled Teens pamphlet. He tells her that he's worried that she will hurt herself, due to the suicide pact rumor that has been spreading about The Liars.
Episcopal Academy is a real private school on Philadelphia's Main Line. It is probably the most similar real school to Rosewood. Episcopal, or 'EA' is located in Newtown Square, PA.