Tanja Tuulia Poutiainen (born April 6, 1980) is a World Cup alpine ski racer from Finland. She was the silver medalist in the women's giant slalom at the 2006 Winter Olympics in Torino.
Born in Rovaniemi, Poutiainen became junior world champion in 1997 in the slalom as well being listed 3rd in the Super G, and the same year debuted in the World Cup. At the 1999 Junior World Championships, she placed third in the giant slalom.
In the 2005 World Cup season, she won the season titles in both the slalom and giant slalom, and placed fifth in the overall standings. At the 2005 World Championships, she placed second in the giant slalom behind Anja Pärson of Sweden and second in the slalom behind Janica Kostelić of Croatia.
Through the 2013 season, Poutiainen has 11 World Cup victories, 48 podiums, and three season titles. She is currently being trained by Michael Bont and lives in St. Gallen, Switzerland.