Old Westbury is a village in Nassau County, in the U.S. state of New York, on the North Shore of Long Island. As of the 2010 United States Census, the village population was 4,671.
Westbury was founded by Edmond Titus, and was later joined by Henry Willis. Henry Willis, one of the first English settlers, named the area after a town in his home county of Wiltshire, England. Westbury had been a Quaker community of isolated farms until the railroad came in 1836; after the Civil War, the New York elite discovered that the rich, well wooded flat countryside of theHempstead Plains was a place to raise horses, and to hunt foxes and play poloat the Meadow Brook Polo Club. The Village of Old Westbury was incorporated in 1924, separating itself from Westbury, the adjacent area that housed many of the families of the construction and building staffs for the Old Westbury mansions.