Cecily of York, Viscountess Welles (20 March 1469 – 24 August 1507) was an English princess and the third, but eventual second surviving, daughter of Edward IV, King of England and his queen consort Elizabeth Woodville, daughter of Richard Woodville, 1st Earl Rivers and Jacquetta of Luxembourg.
She was First Lady of the Bedchamber to the queen in 1485–1487.