| Mia Hagman | |
| Fullname: | Mia Kristiina Hagman |
| Strokes: | Breaststroke |
| Club: | Simmis Hyvinkää |
| Birth Date: | 18 August 1979 |
| Birth Place: | Helsinki, Finland |
| Weight: | 64kg (141lb) |
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.