Her family runs a construction company in Daegu. She and her husband Lee Myung-bak met at the College of Health Education at Ewha Womans University.
On December 19, 1970, after graduation from the University, Kim was engaged to Lee Myung-bak against her family's will. Lee was then director of the Hyundai Engineering Corporation. They have 1 son and 3 daughters together. Kim Yoon-ok enjoys cooking.