The Upper East Side, sometimes abbreviated UES, is a neighborhood in the borough of Manhattan in New York City, bounded approximately by 96th Street to the north, the East River to the east, 59th Street to the south, and Central Park and Fifth Avenue to the west. The area incorporates several smaller neighborhoods, including Lenox Hill, Carnegie Hill, and Yorkville. Once known as the Silk Stocking District, it has long been the most affluent neighborhood in New York City.