William Basset (died c. 1249) was an English judge.
He forfeited for the rebellion in 1216 during the First Barons' War, but later restored his allegiance in 1217.
He assisted as a justiciar in assessing for Derbyshire and Nottinghamshire in 1225, and was appointed as a justice itinerant for these counties on 27 May 1226.
He died sometime in July 1249, when Robert, his heir, did homage.
On 18 October 1341 he was transferred to the King's Bench, where he sat until about 1350.