what county is shirley ny in?
Shirley, NY. Shirley is a hamlet (and census-designated place) in Suffolk County, New York, United States. As of the 2000 census, Shirley population was 26,395. It is named for developer Walter T. Shirley who had the vision in the 1950s to turn the area on Mastic Bay into an affordable enclave. Shirley's company priced its 4,000 four-room homes starting at $4,700, and lots were priced at $295. Shirley is a community in the Town of Brookhaven, on the South Shore of Long Island. Legal