James Roger Johnston (18 June 1930 – 24 June 2020) was an Australian politician. Johnston successfully sought Liberal preselection for Hotham, competing against nine other members. In 1977, he was elected to the Australian House of Representatives as the Liberal member for Hotham. He was a member of the Parliamentary Yacht Club, along with Phillip Lynch, Alan Cadman and Marshall Baillieu. In 1979, Johnston was part of a delegation of Australian parliamentarians sent to Port Moresby to learn about resources development. He was defeated in 1980. He attempted to gain preselection for the 1982 Flinders by-election.