Crofts was the eldest son of Sir John Crofts of Little Saxham and West Stow and his wife Mary Shirley, daughter of Sir Thomas Shirley of Wiston, Sussex. In 1626 he was elected Member of Parliament for Derby He succeeded his father to his estates in about 1628.
He was knighted on 3 February 1611. Crofts was a strong Anglican and was not active during the English Civil War although he was named as commissioner of array for Suffolk in 1642. This was returned when the sequestration was lifted in 1648.
In April 1660, Crofts was elected Member of Parliament for Bury Street Edmunds in the Convention Parliament in a double return, but was seated on the merits of the election.
He became Justice of the Peace in July 1660 and became Deputy Lieutenant and commissioner for assessment in August 1660, holding all roles until his death. Crofts died at the age of 77 and was buried at Little Saxham on 31 March 1667.
Crofts married firstly, according to a settlement on 1 November 1610, Elizabeth Wortley, the daughter of Sir Richard Wortley of Wortley, Yorkshire. Margaret died on 26 May 1674.
The other one was killed in France on the duel by queen"s famous dwarf Jeffrey Hudson on 16 October 1644.
Happy Parliament; 2nd Parliament of King Charles I]
In 1624, he was elected Member of Parliament for Eye.
