Riverside is a neighborhood/section in the town of Greenwich in Fairfield County, Connecticut, United States.

Of these neighborhoods, three (Cos Cob, Old Greenwich, and Riverside) have separate postal names and ZIP codes.

[9] 63.5% of residents identify as non-Hispanic White, 16.5% as Asian, 13.4% as Hispanic, 7.8% as multiracial, 2.2% as Black, and 0.4% as Native American.

Well-known residents of Riverside include television personalities Lara Spencer and Kathie Lee Gifford.

[10][11] Former residents include Olympic gold-medal ice skater Dorothy Hamill and Philadelphia Flyers forward Cam Atkinson.