Colin Dunlop Wilson Rankin, VD (20 January 1869 – 2 November 1940) was a Scottish-born Australian soldier, politician, cane farmer and company director.

Rankin married Annabelle Davidson Thomson on 5 September 1906 at St Stephen's Presbyterian Church, Maryborough; they settled on his plantation.

After unsuccessfully challenging Denham's leadership, Rankin was Secretary for Railways from 6 April 1915 to 1 June 1915, and then became deputy leader of the Liberal Opposition when Labor won the May election.

[6] During the First World War Rankin served briefly in 1915 with the Australian Imperial Force in Egypt before appointment to command the 11th Brigade in the newly formed 3rd Division, as temporary brigadier general from 1 May 1916.

He had found the company in poor shape with a falling output and inadequate coal reserves; charges have also been made of 'intense exploitation, sub-standard conditions and hard-fistedness'.

Rankin died in a private hospital in Brisbane on 2 November 1940, survived by his wife and two daughters, and was buried with Anglican rites in Howard Cemetery.