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is a hamlet (and census-designated place) in Suffolk County, New York, United States. The population was 20,824 at the 2000 census.
East Patchogue is in the Town of Brookhaven. It is served by the Patchogue-Medford School District, except for eastern East Patchogue, where it is served by the South Country Central School District.
East Patchogue is located at (40.768409, -72.983143). According to the United States Census Bureau, the CDP has a total area of 8.5 square miles (21.9 km²), of which, 8.3 square miles (21.5 km²) of it is land and 0.2 square miles (0.4 km²) of it (1.89%) is water.