Wading River is a hamlet and census-designated place (CDP) in Suffolk County, New York, United States, on the North Shore of Long Island. As of the 2010 census, the CDP population was 7,719. It is adjacent to Shoreham and shares a school district.
Most of Wading River lies within the Town of Riverhead, but a small portion is in the Town of Brookhaven. The name of the hamlet comes from the original Algonquian name for the area, Pauquaconsuk, meaning "the place where we wade for thick, round-shelled clams". "Wading in the River" or Wading River was adopted by the first English colonists.