John Charlton (known as Jack), (8 May 1935 – 10 July 2020) was an English footballer and manager who played as a defender. He spent his entire club career with Leeds United from 1950 to 1973, helping the club to the Second Division title (1963–64), First Division title (1968–69), FA Cup (1972), League Cup (1968), Charity Shield (1969), Inter-Cities Fairs Cup (1968 and 1971). His 629 league and 762 total competitive appearances are club records. He was the elder brother of former Manchester United forward Bobby Charlton, who was also one of his teammates in England's World Cup final victory in 1966.

After retiring as a player he worked as a manager, and led Middlesbrough FC to the Second Division title in 1973–74, winning the Manager of the Year award in his first season as a manager. He kept Middlesbrough as a stable top-flight club before he resigned in April 1977. He worked as Newcastle United manager for the 1984–85 season. He then took charge of the Republic of Ireland national team in February 1986, and led them to their first World Cup in 1990, where they reached the quarter-finals. He resigned in January 1996 and went into retirement. Charlton died at his home in Northumberland on 10 July 2020 at the age of 85 after suffering from lymphoma and dementia.

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