Oakdale is a hamlet (and census-designated place) in Suffolk County, New York, United States. The population was 7,974 at the 2010 census. Oakdale is in the Town of Islip.
Oakdale is a scion of America's gilded age of a century ago, where powerful men of incredible wealth built South Shore gold coast mansions and dwelt in manorial splendor.Oakdale originated from a tavern owned by Eliphalet (Liff) Snedecor in what is now Connetquot River State Park. Soon after its founding in 1820, Snedecor's Tavern began drawing New York bluebloods and business barons who wined and dined in remote joy when they weren't fishing and hunting nearby. In 1866, as the railroad reached the area, Liff's wealthy patrons formed the Southside Sportsmen's Club, and soon the race was on to see who could create the most superb spread in the thick forests adjoining Great South Bay.The most prominent were William K. Vanderbilt, grandson of railroad magnate Cornelius Vanderbilt; Frederick G. Bourne, president of the Singer Sewing Machine Co., and Christopher Robert II,an eccentric heir to a sugar fortune. Meanwhile, William Bayard Cutting, a lawyer, financier and railroad man, built his estate next door in Great River, which had once been west Oakdale.