Mary Long may refer to: Mary Long (soccer) (born 2007), American soccer player Mary Beth Long (born 1963), American businesswoman and former U.S. government official Mary Elitch Long (1856–1936), one of the original owners of Elitch Gardens in Denver, Colorado Mary "Polly" Long, first wife of Tobias Lear V "Mary Long", a song by Deep Purple from their 1973 album Who Do We Think We Are