James Alexander Robb, (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.
He served as Liberal Party Whip from 1919 to 1921.
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.