A frequently told story of Marsh's childhood is "Her father, a railroad auditor, died when she was four. Her family moved to San Francisco, California, where her stepfather was killed in the great earthquake of 1906. Her great-aunt then took Mae and [her older sister] Marguerite to Los Angeles, hoping her show business background would open doors for jobs at various movie studios needing extras." However, her father, S. Charles Marsh, was a bartender, not a railroad auditor, and he was alive at least as late as June 1900, when Marsh was nearly six. Her stepfather, oil-field inspector William Hall, could not have been killed in the 1906 earthquake, as he was alive, listed in the 1910 census, living with her mother and sisters.