Major Harry Barnes (5 December 1870 - 12 October 1935) was an architect and politician who had two terms on the London County Council.
A native of Sunderland, Barnes designed a number of municipal buildings in the North East. He held the rank of major in a Volunteer Force battalion of the Northumberland Fusiliers.
He was elected as a Coalition Liberal Party member of parliament for Newcastle upon Tyne East at the 1918 general election. Following a split in the Liberals he joined the anti-coalition faction and lost the seat at the 1922 general election. He made four attempts to regain a seat in the Commons under various Liberal labels without success between 1923 and 1928 without success.
In the meantime he entered local government in London: on 23 October 1923 he was elected to fill a casual vacancy as an alderman, serving until March 1925. He sat as member of the Liberal-backed Progressive Party.
Barnes had always been on the radical wing of the Liberals, and he eventually joined the Labour Party. He returned to the county council when he was elected as a Labour councillor to represent Fulham East in 1934. He was made chairman of the LCC Town Planning Committee and died in office the following year.
- "Obituary: Major Harry Barnes: Housing and Planning". The Times: p. 20. 14 October 1935.