Ian Glen Collins (23 April 1903 – 20 March 1975) was a Scottish tennis player who represented Great Britain in the Davis Cup.

Collins, primarily a doubles player, never fully recovered from a broken leg in his youth but still had a lengthy tennis career.

Collins and Gregory lost to Jack Crawford and Harry Hopman in the Australian final in five sets, but beat them in the 1930 Davis Cup.

As a singles player, Collins had his best showing in 1930 when he reached the fourth round, before being eliminated by Bunny Austin.

The following year he had the best win of his career when he defeated number one seed Henri Cochet in the second round of the 1931 Wimbledon Championship in four sets.