James McLachlan Turnbull (born 23 May 1882) was a Scottish footballer who played as a forward, most notably for Manchester United, with whom he won the Football League and the FA Charity Shield in 1908 and the FA Cup in 1909.

Turnbull played for Scottish clubs East Stirlingshire, Dundee, Falkirk and Rangers,[2] before moving to England to sign for Preston North End and later the now dissolved Leyton.

He was sold to Bradford Park Avenue in September 1910, and later played for Chelsea.

[4] He played in the annual Home Scots v Anglo-Scots international trial match in 1911,[5] but did not receive any other representative honours.

His elder brother Tom Turnbull was also a footballer who played as a defender, also featuring for Stenhousemuir, East Stirlingshire and Falkirk as well as Celtic and Sheffield United, but suffered a serious injury soon after joining the English club.