The 1891 British Isles tour to South Africa was the first British Isles rugby union tour of South Africa and only the second overseas tour conducted by a joint British team. Between 9 July and 7 September, the team played 20 games, including three Tests against the South Africa national rugby union team. The British Isles not only won all three Test matches, but also won all 17 provincial games. Although not named as such at the time, the tour is retrospectively recognised as a British Lions tour.