William Fulbourn (died c. 1441), of Fulbourn St. Vigors, Cambridgeshire, was an English politician.
Fulbourn may have been the illegitimate son of William Fulbourn and Alice Whiting of Fulbourn.
William married before 1396.
He was a Member (MP) of the Parliament of England for Cambridgeshire in December 1421.
This article about a 15th-century member of the parliament of England is a stub.