James Alexander Robb, PC (10 August 1859 – November 11, 1929) was a Canadian Member of Parliament and cabinet minister.

Robb was a member of the Liberal Party of Canada.

From 5 September 1925 to 28 June 1926 and again from 25 September 1926 until his death, he served as Minister of Finance in the administration of William Lyon Mackenzie King.

He served briefly as Acting Minister of National Defence in October 1926.

This article about a Quebec Member of Parliament from the Liberal Party of Canada is a stub.