Louis Joseph Barnes (13 January 1906 – 2 June 1983) was a member of the Queensland Legislative Assembly.
He was educated at the Christian Brothers' College in Gympie and after leaving school was a tea merchant in 1932, a traveler for the Castlemaine Perkins and from 1947 until 1975 a men's Mercer at Beaudesert.
Barnes, a member of the King O'Malley Labor Party, won the 1942 by-election for the seat of Cairns in the Queensland Legislative Assembly.
[3] He went on to represent the electorate until 1947 when he was defeated by Thomas Crowley at that year's state elections.
[4] After his defeat, Barnes was an alderman on the Gold Coast City Council from 1949 until 1952.