Riverside is a small city in Walker County, Texas, United States. The population was 510 at the 2010 census. Two famous natives of Riverside are the singer-actress Jennifer Holliday, who is best known for her creation of the role of Effie in the successful Tony-award-winning Broadway musical "Dreamgirls", and Eugene C. Barker, a Texas historian, who was affiliated with the University of Texas at Austin from 1895, when he arrived as a student, until his death.