Brian Ransom (June 6, 1940–February 26, 2020) was a Canadian provincial politician in Manitoba. In 1983, he unsuccessfully ran for the leadership of the Progressive Conservative Party of Manitoba. He ran for the party's leadership in 1983 as a representative of the party's rural/conservative wing, but on the second ballot lost to Gary Filmon, who was then regarded as a progressive. Subsequently, supporters of Ransom would allege that the Filmon camp encouraged third-place candidate Clayton Manness to run as a means of splitting the conservative vote.
Ransom did not seek re-election in the 1986 Manitoba general election. He subsequently became chairman of the Manitoba Hydro-Electric Board, and worked as a consultant in sustainable development.