John Thomas Carr (7 October 1878^[2] – 17 March 1948^[3][1]) was an English professional footballer with Newcastle United between 1899 and 1912, playing at full back, he made 279 appearances, scoring 5 goals.

Carr won three League Championships and the FA Cup with Newcastle in this successful period of the club's history.

He made two appearances for England, both against Ireland, in a 1–1 draw on 25 February 1905 and in a 1–0 victory on 16 February 1907.

In 1912, he became a trainer at Newcastle United and would fill this position for the next 10 years. He eventually left the club when Blackburn Rovers made him their manager in 1922. Carr was the coach of the Danish national side at the 1920 Summer Olympics football competition in Antwerp.

Carr served as a corporal in the Army Service Corps during the First World War.^[4]

Newcastle United

• First Division champions: 1904–05, 1906–07, 1908–09
• FA Charity Shield winner: 1909
• FA Cup winner: 1910