Ko Oo was born on September 14, 1962. He studied under U Chit Tun and U Kyaw Myint Naing, and holds a Bachelor of Science and a Bachelor of Education. Ko Oo is a lecturer in art at the Education College in Taunggyi.
His favourite medium is watercolor. Ko Oo has exhibited his paintings at multiple shows in Yangon and Taunggyi. His most recent shows were at the Cherry Space in Yangon and at Saung Alin Kar in Taunggyi.