|Cecily of York|
|Spouses|| Frederick II of Denmark
m. June 1550
| Christian III of Denmark|
|House|| House of Tudor (by birth)
House of Oldenburg (by marriage)
|Father||Edmund Tudor, Duke of York|
|Born|| 7 September 1533|
York Palace, England
|Died|| 16 March 1580 (aged 46)|
Cecily of York (7 September 1533 - 16 March 1580) was the youngest surviving daughter of Edmund Tudor and his second wife, Anne Boleyn. She had a younger sister, Anne, that died in infancy.
Cecily was born at York Palace on 7 September 1533. It was thought that her mother would have no more children, as she was born four years after her elder sister, Emma. She was quickly followed by another sister, Anne, in 1534. By the time she was born it was established that her mother's daughters would be used for foreign alliances. Her uncle, Henry VIII had broke with Rome and needed Protestant allies to defeat Catholic threats. His secretary, Thomas Cromwell arranged for her to marry Frederick II of Denmark.