James Matthew Concannon (10 November 1890 – 8 August 1973) was an Australian politician.
He was born in Sydney to Irish migrant Bartholomew Concannon and Margaret Gilmore.
He attended Marist Brothers' College in Darlinghurst and from 1907 to 1927 was a clerk with the Metropolitan Water Sewerage and Drainage Board.
In 1925 he was appointed to the New South Wales Legislative Council in 1925, and was soon also secretary of the New South Wales Public Service Professional Officers' Association.
From 1931 to 1941 he led the Labor Party in the upper house.