Peter Doig (5 January 1882 – 13 October 1952) was a Scottish trade union leader.
Born in Glasgow, Doig served his apprenticeship as a draughtsman at John Brown and Company in Clydebank.
He returned to the UK during World War I, and worked for William Beardmore and Company in Dalmuir.
Doig stood for the post, defeating T. C. Dickie, W. Herd, W. MacFarlane and David Manktelow, and taking up the position in January 1918.
The union grew greatly under his leadership; by the time he retired on health grounds in 1945, it was a force in the engineering and shipbuilding industries.