The Asbury Park Press reports that the Lacey Township Board of Education took the action Friday night against Superintendent Sandra Brower.
She initially was suspended with pay after the district learned of the charges.
Brower has pleaded not guilty to charges of official misconduct, obstruction and hindering apprehension.
The counts stem from an incident that prosecutors say occurred in 2009, while the 46-year-old Brower was serving as Wall's assistant school superintendent.
Brower left Wall in 2011 to become superintendent in Lacey. She was paid $167,500 in 2012.
Prosecutors tell the newspaper that the sexual assault accusation proved to be unfounded.
Information from: Asbury Park (N.J.) Press