Ian Pieris (14 March 1933 – 1 January 2016) was a Sri Lankan first-class cricketer. He was born in Colombo, Sri Lanka. He was an important figure in Sri Lankan sports. He was a former president of Sri Lanka Cricket (1989, 1990-1991).
Pieris also had a long cricket career playing as a top-order batsman for St. Thomas' College and as a right-arm opening bowler for Singhalese Sports Club, Cambridge University and All-Ceylon. He retired from sports activities in 2003 due to health problems.
Pieris died at the age of 82 in Colombo, Sri Lanka from a long illness.