Copiague ( /koʊpeɪɡ/ koh-payg or /koʊpɛɡ/ koh-peg) is a hamlet (and census-designated place) in Suffolk County, New York, United States. The population was 18,037 at the 2007 census. Once Copiague was a thriving Italian community. Many years ago a part of Copiague was named after Marconi. The ethnic makeup of the hamlet is quite diverse, making Copiague a rich cultural nexus. North Amityville is on one of Copiague's borders and uses Copiague Schools.
Copiague is an unincorporated place within the Town of Babylon.
Copiague is located at 40°40′29″N 73°23′36″W / 40.67472°N 73.39333°W / 40.67472; -73.39333 (40.674700, -73.393235). It is approximately 70 miles west of Montauk Point, 35 miles east of New York City. Copiague is bordered by Lindenhurst, Amityville, Copiague Harbor, and the Great South Bay.