Theresa Frostad Eggesbø is a Norwegian biathlete who has competed since the late 1990s. She won a silver medal in the 4 x 6 km relay at the 2001 World Championships. Her best individual finish at a World Championships was fourth, in the 20 km individual in 2005.
Eggesbø also finished fifth in the 20 km individual event at the 2006 Winter Olympics. At the Biathlon World Cup, she has two wins, both in relays (1999 and 2001). Her total of thirteen podium finishes includes six-second places and five third places.