Mia Hagman (born August 18, 1979 in Helsinki, Finland) is a retired female breaststroke swimmer from Finland.
Hagman competed for her native country at the 1996 Summer Olympics in Atlanta, Georgia.
Her best result was a 14th place with the women's 4×100 m medley relay team at the 1996 Summer Olympics, alongside Minna Salmela, Anu Koivisto, and Marja Pärssinen.