Sofia Viktoria Katarina Lundgren is a former Swedish goalkeeper who began playing football with Ersmark IK and also represented Ersboda SK before moving into senior football with Umeå Södra FF. She joined Umeå IK in 1999 and was part of one of the dominant teams in the history of Swedish women's football, winning multiple Swedish championships and two UEFA Women's Cup titles during her years with the club.
After leaving Umeå, Lundgren spent two seasons with AIK before joining Linköpings FC in 2009. She immediately helped Linköping win the Swedish championship and established herself as one of the country's leading goalkeepers, culminating in being named Sweden's Women's Goalkeeper of the Year in 2010. A serious back injury disrupted the latter part of her Linköping career and kept her out of football throughout 2014. She returned with Hammarby in 2015 before spending her final season with FC Rosengård in 2016.
Lundgren made her senior debut for Sweden against England in March 2002 and finished her international career with 30 appearances. She was part of Swedish squads at several major championships during an era of strong competition for the goalkeeper position. Recurring back problems eventually led her to end her playing career after the 2016 season.

Lundgren ended her playing career after the 2016 season following recurring back problems. At the time of her retirement she returned to work as a football instructor in Stockholm and later remained involved in football coaching.