| Karin Lundgren | |
| Birth Name: | Karin Wallgren |
| Birth Place: | Göteborg, Sweden |
| Height: | 1.66m (05.45feet) |
| Weight: | 56kg (123lb) |
| Sport: | Athletics |
| Event: | 100–400 m |
| Club: | GKIK, Göteborg |
| Pb: | 100 m – 11.5 (1967) 200 m – 23.49 (1970) 400 m – 52.8 (1970) |
| Show-Medals: | yes |
Karin Elisabeth Lundgren (née Wallgren on 19 May 1944) is a retired Swedish sprinter. She competed at the 1968 and 1972 Summer Olympics in various 100–400 m events (five in total), but failed to reach the finals. She won the 400 m contest at the 1967 European Indoor Games, and placed fifth at the 1969 European Athletics Championships and fourth at the 1971 European Athletics Indoor Championships.
Wallgren-Lundgren won the national championships in the 100 m (1966 and 1968–71), 200 m (1962, 1965–66, 1968–70 and 1972), 400 m (1966 and 1968–72), and various relays (24 times). She held national records over 100 m, 200 m and 400 m. After retiring from competitions she was deputy chairman in Swedish Athletics Association.