The 1984 Great Britain Lions tour was the Great Britain national rugby league team's 17th tour of Australasia and took place from May to August 1984. A total of 24 matches were played against local club and representative sides during the tour, including a three match Test match series against Australia and New Zealand respectively, and one Test match against Papua New Guinea. It was the first tour since 1950 in which Great Britain lost both series against Australia and New Zealand, and the first tour ever where they failed to win a Test against either team.