Manorville is a census-designated place (CDP) in Suffolk County, New York, United States. The population was 11,131 at the 2000 census. Manorville is the largest hamlet in the state of New York in terms of area. Manorville is served by the Eastport-South Manor Central School District. Manorville is in Town of Brookhaven, but its northeast corner is in Town of Riverhead.