Kim Sung-il

Kim Sung-il (김성일) may refer to:
 * Kim Seong-il (1538–1593), Joseon Dynasty politician
 * Kim Sung-il (general) (born 1948)
 * Kim Sung-il (footballer) (born 1973)
 * Kim Seoung-il (born 1990), South Korean short track speed skater
 * Kim Song-il (North Korean politician)
 * Kim Song-il (gymnast), North Korean gymnast