Maureen Johnson Smith Long (July 4, 1882 – "June 20, 1982") most often referred to as Maureen Johnson, is a fictional character in several science fiction novels by American writer Robert A. Heinlein. She is the mother, lover, and eventual wife of Lazarus Long, the longest-living member of Heinlein's fictional Howard families. She is the only character from the "Lazarus Long cycle" to have an entire fictional memoir devoted to her life.