Background
Cooper was the second son of Sir John Cooper, 1st Baronet of Rockbourne, Hampshire and was baptised on 15 December 1626.
Cooper was the second son of Sir John Cooper, 1st Baronet of Rockbourne, Hampshire and was baptised on 15 December 1626.
Exeter College.
He fought in the Parliamentary army in the English Civil War. He was a student at Exeter College, Oxford in 1642. He joined the parliamentary army and was a captain by 1644 and major by 1646.
He was commissioner for militia for Tower Hamlets from 1648 to 1649 and a Justice of the Peace for Middlesex from 1648 to July 1660.
By 1649 he was also Justice of the Peace for Dorset. From 1649 to February 1660 he was trustee for maintenance of ministers.
He was commissioner for assessment for Middlesex in 1650 and 1652 and became Justice of the Peace for Wiltshire instead of Dorset in 1653. He was commissioner for oyer and terminer on the Western circuit in 1655.
In 1657 he was commissioner for assessment for Wiltshire.
He was commissioner for assessment for Middlesex and Wiltshire in January 1660, commissioner of Admiralty from February to July 1660 and commissioner for militia for Middlesex and Wiltshire in March 1660. In April 1660 he became freeman of Poole and was elected Member of Parliament for Poole in the Convention Parliament. However his petition was unsuccessful and the park was granted to the George Monck, 1st Duke of Albemarle in 1665.
He continued living nearby at Farley.
In 1666 Cooper obtained the post of treasurer of prizes at Dover 1666. He was commissioner of revenue arrears in 1671.
He was commissioner for assessment for Wiltshire from 1673 to 1680. Cooper died at the age of about 62 in or before July 1689 when he was described as "recently deceased".
Cavalier Parliament]
In 1650 he was a member of the high court of justice. In 1654, Cooper was elected Member of Parliament for Poole in the First Protectorate Parliament. Also in 1654, he was a member of the high court of justice and commissioner for scandalous ministers for Wiltshire.