The Upper East Side is a neighborhood in the borough of Manhattan in New York City, between Central Park and the East River. The Upper East Side lies within an area bounded by 59th Street to 96th Street, and the East River to Fifth Avenue-Central Park. The ZIP codes included in this neighborhood are 10021, 10022, 10028, 10075, 10128, 10029 and 10065.
Once known as the 'Silk Stocking District', it retains its position as one of the most affluent neighborhoods of New York City.
Before the arrival of Europeans, the mouths of streams that eroded gullies in the East River bluffs are conjectured to have been the sites of fishing camps used by the Lenape, whose controlled burns once a generation or so kept the dense canopy of oak-hickory forest open at ground level.