Jay is a surname. Notable people with the surname include:
Allan Jay (born 1931), British world champion épée & foil fencer
Antoine Jay (1770–1854), French writer
Antony Jay (1930–2016), British writer
Bill Jay (1940–2009) photographer, magazine and picture editor, etc
Candee Jay (born 1981), Dutch musician
Charlotte Jay (1919–1996), Australian writer
David Jay (born 1982), American activist
Douglas Jay, Baron Jay (1907–1996), British politician
Isabel Jay (1879–1927), British opera singer
Joey Jay (born 1935), American baseball player
John Jay (1745–1829), American politician and jurist
John Jay (1817–1894), American lawyer
Joke Jay, German DJ
Karla Jay (born 1947), American writer
Margaret Jay, Baroness Jay of Paddington (born 1939), British politician
Martin Jay (born 1944), American historian
Michael Jay, Baron Jay of Ewelme (born 1946), British politician
Norman Jay, British DJ
Paul Jay, Canadian film director
Paul L. Jay (born 1946), American literary theorist
Peter Augustus Jay (1776–1843), American public servant
Peter Jay (born 1937), British broadcaster and diplomat
Pierre Jay (1870–1949), American banker
Ricky Jay (born 1948), American magician
Steve Jay (born 1951), American bassist
Tony Jay (1933–2006), British actor
Tyler Jay, baseball player
Vincent Jay (born 1985), French biathlete
William Jay (minister) (1769–1853), British preacher
William Jay (jurist) (1789–1858), American jurist
William Jay (Colonel), American army colonel
Jay is also a transliteration of the Korean surname Chae.
