Sir William Allanson (died 6 December 1656) was an English merchant draper and politician who sat in the House of Commons from 1640 to 1653.
He was a draper and became a freeman of the city of York in 1610.
[1] In November 1640, Allanson was elected Member of Parliament for York in the Long Parliament.
[2] Allanson was buried at St Michael le Belfrey, York on 7 December 1656.
Allanson married firstly on 12 December 1621 Lucy Orracke, daughter of Alexander Orracke.