Career
Compton was educated at Eton College, before attending Queens' College, Cambridge; in 1638, he accompanied his father to The Hague in the retinue of Charles' nephew, the Elector Palatine. He spent the next two years travelling in Europe, before returning home to stand for election as MP for Warwickshire in November 1640. He was one of 53 MPs to vote against the Attainder of Charles' chief minister, the Earl of Strafford, who was executed in May 1641.
When the First English Civil War began in 1642, his father was appointed Commissioner of Array for Warwickshire, Northamptonshire and Gloucestershire; Compton was slightly wounded in one of the first actions of the war, an attack on Warwick Castle. He and his three younger brothers served at Edgehill in October 1642, before capturing Banbury Castle in November, which they used as a base for operations.
In March 1643, a Royalist cavalry force including Compton and led by his father the Earl of Northampton clashed with a Parliamentarian army under Sir John Gell at Hopton Heath. One Royalist charge over-ran the Parliamentarian artillery, in the course of which the Earl was unhorsed, then killed after refusing to surrender; Gell offered to hand over his body if Compton returned the captured artillery, a suggestion he refused.
His father's death meant Compton inherited his titles and regiments; he fought at the First Battle of Newbury in September 1643, then Cropredy Bridge in June 1644, before being routed by Oliver Cromwell at Islip, Oxfordshire in April 1645. He was present at Naseby in June, a defeat that destroyed the last major Royalist field army, and accompanied Charles on the attempt to link up with Montrose in Scotland that ended at Rowton Heath in September. He returned to Oxford and surrendered to the Committee of Both Kingdoms in February 1646, shortly before the war ended in June.
After paying a fine, he resumed ownership of his estates in 1651 and most of his literary output dates from this period, which includes several plays and poems, as well as translations of French and Italian works. He also supported a number of minor poets and playwrights, the most significant being Cosmo Manuche, a former Royalist officer. While his brother William was involved in the Royalist underground as a member of the Sealed Knot, Compton remained largely undisturbed by the authorities, although he was briefly arrested for his part in the 1659 Booth's Uprising.
Following The Restoration in 1660, Compton was rewarded by Charles II with appointments as Lord Lieutenant of Warwickshire and Recorder of Coventry, which he held until his death. As lord-lieutenant he personally commanded a Troop of the Warwickshire Militia Horse, and used the militia to destroy the fortifications of Coventry, which had been the most republican town in the county during the war. He attended the House of Lords on a regular basis, his most significant act being to propose the banishment of Clarendon, former advisor to Charles I and Lord Chancellor from 1660 to 1667. The diarist Samuel Pepys described this as a "thing of vanity and insult...which is mighty poor I think, and so doth everyone else". He was made a Privy Councillor in 1673, then Constable of the Tower of London in 1675, before being removed from both posts during the 1679 Exclusion Crisis.
After his death on 15 December 1681, he was buried in the family vault at Compton Wynyates, next to his first wife and succeeded as fourth Earl of Northampton by his son George.