The student had told police that Roethlisberger sexually assaulted her last month at a nightclub in the central Georgia college town of Milledgeville.
Roethlisberger, who is 28, owns a home about 30 miles north of Milledgeville on Lake Oconee.
He also is being sued by a woman who claims he raped her in 2008 at a hotel and casino in Lake Tahoe, an allegation he strongly denies.