 IOL 17 was held from July 29 to August 2, 2019 at the Hankuk University of Foreign Studies in Yongin, South Korea.Chaired by Minkyu Kim and Yoojung Chae, it received 53 teams from 35 countries, with Nepal, Hong Kong, Uzbekistan and Colombia competing for the first time.The Problem Committee was chaired by Tae Hun Lee.