Ruark is a surname. Notable people with the surname include:
Arthur Ruark (1899–1979), American physicist Davis R. Ruark (born 1955), former State's Attorney for Wicomico County, Maryland Gibbons Ruark (born 1941), contemporary American poet Jeanne Ruark Hoff, former college basketball player Rebecca T. Ruark, Chesapeake Bay skipjack Robert Ruark (1915–1965), American author and syndicated columnist
See also Ruark number, a dimensionless number see in fluid mechanics