Robert K. "Bob" Sweeney (born May 29, 1949) is a retired New York Assemblyman first elected in 1988 to represent the 11th district, which includes Lindenhurst, Copiague, Amityville, Wyandanch, and West Babylon. He is a Democrat. Sweeney is a lifetime resident of the district he represents and attended public schools in Lindenhurst. He earned a bachelor's degree from Adelphi University and a Master of Public Administration from the C.W. Post Campus of Long Island University. He served as the Lindenhurst Village Clerk from 1973 to 1988.