Yūki (written: 結城 or 夕樹) is a Japanese surname. Notable people with the surname include:
Aira Yuhki (born 1981), Japanese singer
Asuka Yūki, Japanese AV idol
Satoshi Yuki (born 1972), Japanese professional Go player
Hiro Yūki (born 1965), Japanese voice actor
Maiko Yūki (born 1977), Japanese AV idol, actress and stripper
Masahiko Yuki (born 1975), Japanese guitarist
Nobuteru Yūki (born 1962), Japanese manga artist, illustrator, and animator
Yuki Hide a.k.a. Hideyuki Hirano (1940–1998), Japanese singer
Yūki Hideyasu (1574–1607), Japanese daimyo who lived during the Azuchi-Momoyama and early Edo periods
Yūki Masakatsu (1503–1559), Japanese samurai during the Sengoku period
