Kips Bay, or Kip's Bay, is a neighborhood on the east side of the New York City borough of Manhattan. It is roughly bounded by 34th Street to the north, the East River to the east, 23rd Street to the south, and Third Avenue to the west.

Kips Bay is part of Manhattan Community District 6, and its primary ZIP Codes are 10010 and 10016. It is patrolled by the 13th and 17th Precincts of the New York City Police Department.

According to The Encyclopedia of New York City and the New York City Department of City Planning, Kips Bay proper is generally bounded by East 34th Street to the north, the East River to the east, East 27th Street to the south, and Third Avenue to the west. City documents have also used New York City census tract 70 (from 29th to 34th streets, First to Third avenues) as an approximation for Kips Bay, and referred to tract 66, immediately below it, as "Bellevue South".

The American Guide Series defines the combined Kip's Bay–Turtle Bay area as running from 27th Street north to 59th Street, and from Third Avenue to the East River, excluding the neighborhoods of Beekman Place and Sutton Place.

For its entry on Kips Bay, the American Institute of Architects' AIA Guide to New York City uses the area from 23rd Street north to roughly 38th Street, and from the East River west to just past Second Avenue. In AIA Guide, Kips Bay is adjacent to Tudor City and the United Nations/Turtle Bay area on the north, Murray Hill and Rose Hill on the west, and the Stuyvesant Square area and Peter Cooper Village on the south.

Other popular definitions of the neighborhood, such as that by The New York Times, include 23rd Street to the south, 34th Street to the north, Lexington Avenue to the west, and the East River to the east. To the north is Murray Hill; to the west is Madison Square, NoMad, and/or Rose Hill; and to the south is the Bellevue area or the Gramercy Park neighborhood and Peter Cooper Village.

Kips Bay was an inlet of the East River running from what is now 32nd Street to 37th Street. The bay extended into Manhattan Island to just west of what is now First Avenue and had two streams that drained into it. Although the bay later became reclaimed land, Kips Bay remained the name of the area.

The bay was named after New Netherland Dutch settler Jacobus Hendrickson Kip (1631–1690); son of Hendrick Hendricksen Kip), whose farm ran north of present-day 30th Street along the East River. "Kip's Bay Farm" comprised a much wider area than the present neighbourhood and four properties established by early Dutch settlers: "Pieter van der Linde's Plantation", an area originally granted to Teunis Cray, "Gregorys Plantation" (probably in or near Midtown East) and "Schepmoes Plantation" (the northernmost, possibly in the vicinity of Lenox Hill). In 1655, Jacobus Kip built a large brick and stone house, near the modern intersection of Second Avenue and East 35th Street. The house was expanded more than once during the next two centuries, When the house was demolished (1851), it was the last farmhouse from New Amsterdam remaining in Manhattan. Iron figures fixed into the gable-end brickwork commemorated the year of its first construction. Its orchard was famous, and, when first President George Washington was presented with a specimen of its Rosa gallica during his first administration (1789–1793), when New York was serving as the first national capital city, it was claimed to have been the first garden to have grown it in the Thirteen Colonies.