John Campbell Elliott (August 25 1872 - December 20 1941) was a Canadian politician.

A lawyer by profession, J. C. Elliott was first elected to the Ontario legislature in 1908 as the MPP for Middlesex West and a represntative of the Ontario Liberal Party. The Liberals were out of government for the entire time Elliott was an MPP. In 1919 he ran in the first Ontario Liberal Party leadership convention coming in a poor third and left provincial politics shortly afterwards.

Elliott moved to federal politics a few years later winning a seat in the Canadian House of Commons in the 1925 Canadian election as the Liberal MP for the London, Ontario area riding of Middlesex. In March 1926 he was appointed to the Canadian Cabinet by William Lyon Mackenzie King as Minister of Labour. In September of that year he was moved to the position of Minister of Public Works and remained in that portfolio until the Liberal government's defeat in the 1930 Canadian election. Elliott was personally re-elected and sat on the Opposition benches until the Liberals returned to power in the 1935 Canadian election after which Elliott returned to Cabinet, this time as Postmaster-General. In 1940 he was appointed to the Canadian Senate where he sat until his death the next year.