Sir Thomas Walsingham (c. 1589 - April 1669) was an English politician who sat in the House of Commons at various times between 1614 and 1640.
He supported the Parliamentarian side in the English Civil War.
He was elected MP for Rochester in 1621 and again in 1628 and held the seat until 1629 when King Charles I decided to rule without parliament for eleven years.
In April 1640, Walsingham was re-elected MP for Rochester for the Short Parliament and again in November 1640 for the Long Parliament when he sat until 1653, surviving Pride's Purge.
Walsingham married twice, his first wife being Elizabeth Manwood, daughter of Sir Peter Manwood, who died giving birth to a daughter in January 1616.