Manorville is a hamlet and census-designated place (CDP) in Suffolk County, New York, United States. The population was 14,314 at the 2010 census.
Manorville is served by the Eastport-South Manor Central School District and is mostly in the Town of Brookhaven, but its northeast corner is in the Town of Riverhead.
Manorville is located at 40°50′53″N 72°47′38″W (40.848192, -72.793920).
According to the United States Census Bureau, the CDP has an area of 25.5 square miles (66.1 km2), of which 25.5 square miles (66.0 km2) is land and 0.04 square miles (0.1 km2), or 0.16%, is water.
The hamlet is at the western edge of, and partially within, the Long Island Central Pine Barrens. The land is heavily wooded, and features some wetlands, particularly in the northern section near the Peconic River. Much of the northeastern portion of the hamlet is in the Pine Barrens' "Core Preservation Area", where no further development is allowed. This area also serves as a primary source for Long Island's groundwater preserve.
Manorville is known for its close proximity to the Hamptons, earning the nickname "The Gateway to the Hamptons".
Manorville is in the center of Long Island with no access to the water. It lies partially on the Ronkonkoma terminal moraine, which creates some slightly rolling topography, especially in the central portion of the hamlet. The glacial topography of the area features several kettle hole ponds, the most well-known of which is Punk's Hole, where a Revolutionary War captain was rumored to have hid from the British.