Riverside is a neighborhood/section in the town of Greenwich in Fairfield County, Connecticut, United States. As of the 2010 census, it had a population of 8,416.The town of Greenwich is one political and taxing body, but consists of several distinct sections or neighborhoods, such as Banksville, Byram, Cos Cob, Glenville, Mianus, Old Greenwich, Riverside, and Greenwich. Of these neighborhoods, three have separate postal names and ZIP codes.St. Paul’s Episcopal Church, at 200 Riverside Avenue in Riverside, has held its "Fair for All" since 1942. Money raised goes directly to local charities.Well-known residents of Riverside include Lara Spencer, television journalist, and Lois Darling, an author, illustrator and researcher. Gold Medal ice skater Dorothy Hamill and Columbus Blue Jackets forward Cam Atkinson also grew up in Riverside. Riverside is also home to Frank and Kathie Lee Gifford. New York Rangers forward Martin St. Louis also lives in Riverside with his three sons and wife.