Omar Leslie Kilborn (Chinese name: 啓爾德; 启尔德; 1867–1920), was a Canadian medical missionary who greatly advanced Western medical techniques in West China. He was one of the founders of the West China Union University in Chengdu, Sichuan, China and was a member of the Canadian Methodist Church. He was an educator, a leading professor of science and medicine, and the author of multiple medical and linguistic texts.