The Battle of Chalgrove was a small battle during the English Civil War in the county of Oxfordshire. It took place around 09:00 hours on the morning of 18 June 1643 in Chalgrove Field, northeast of Chalgrove in Oxfordshire. It was a minor Royalist victory and is notable for the mortal wounding of Parliamentarian Colonel John Hampden, who died six days later of his wounds.