Background
Jenkinson was the son of Sir Robert Jenkinson of Walcot, Oxfordshire and his wife Anna-Maria Lee, daughter of Sir Robert Lee of Billeslee.
Jenkinson was the son of Sir Robert Jenkinson of Walcot, Oxfordshire and his wife Anna-Maria Lee, daughter of Sir Robert Lee of Billeslee.
He matriculated at Trinity College, Oxford aged 16 on 16 December 1636 and was called to the bar at Inner Temple in 1649. He was re-elected Member of Parliament for Oxfordshire in 1656 for the Second Protectorate Parliament and in 1659 for the Third Protectorate Parliament. He was created baronet on 18 May 1661.
Jenkinson died at the age of 56.
Jenkinson married Mary Banks, daughter of Sir John Bankes Personal Computer of Kingston Hall, Dorset.
In 1654, Jenkinson was elected Member of Parliament for Oxfordshire in the First Protectorate Parliament.