Police Constable Joseph Grantham (died 1830) was the first police officer to be killed whilst on duty in the United Kingdom.
Joseph Grantham was a police officer in the Metropolitan Police Service which had been formally established in 1829. While on duty on June 28, 1830, he intervened in a fight between two drunks in Somers Town, London, during the altercation Grantham was beaten to death. At his inquest, the jury returned a verdict of "justifiable homicide", possibly due to dislike of the new police force. Grantham was held to have contributed to his own death by "over-exertion in the discharge of his duty".[1][2]