Miia may refer to:
People Miia Hakala (b. 1987), Finnish artistic gymnast Miia Kivipelto (b. 1974), Finnish neuroscientist Miia Niemi (b. 1983), Finnish former footballer Miia Nuutila (b. 1972), Finnish television actress Miia Rannikmäe (b. 1951), Estonian chemist MIIA (b. 1997), Norwegian singer
Fictional characters Miia, a character in the Japanese manga series Monster Musume