Locust Valley Home Inspections Completed Full Inspections In Locust Valley 7/24/2017 5 Wildwood Ct 5/6/2017 56 12th St 6/16/2016 56 Davis St 4/5/2016 11 Beaver Dr 2/27/2015 10 8th St 2/24/2013 17 7th St 10/16/2012 23 Buckram Rd Back to Completed Home Inspections Locust Valley is a hamlet and census-designated place (CDP) located in Nassau County, New York. Locust Valley is an unincorporated area of the Town of Oyster Bay. As of the United States 2010 Census, the CDP population was 3,406. The area is commonly identified with its W.A.S.P and "White Shoe" culture surrounding a group of polo and golf clubs, primarily the secretive Piping Rock Club, as well as the equally prestigious Creek Club, in the neighboring incorporated villages of Matinecock and Lattingtown, respectively. The town is also known for Locust Valley lockjaw. Figures ranging from the Duke of Windsor to John Lennon to Franklin D. Roosevelt have spent considerable time in Locust Valley.