Bertram Ashburnham or Bertram de Ashburnham (c. 1010 – 1066) was an 11th-century English nobleman who served as the last Anglo-Saxon Constable of Dover Castle for about ten months in 1066 following the coronation of Harold Godwinson.

[2] It is said that Bertram was Governor of Dover Castle, possibly under Edward the Confessor as part of the Cinque Ports prior to Harold Godwinson crowning himself king on January 6, 1066.

[3] It is thought that not long after participating in the Battle of Hastings and Godwinson's death on October 14, he was executed by William the Conqueror in Canterbury.

Regardless of the exact time of his death, Bertram's occupation of the aforesaid position would have been somewhat brief, as Norman knight William Peverel would possibly serve for a short period in 1066 following the start of the Norman Conquest of England.

[6] However it is confirmed that Odo of Bayeux, also of Norman origin, would take charge before the end of the year and serve as the Earl of Kent until 1082.