Therese Johaug (born 25 June 1988) is a Norwegian cross-country skier who has competed for the clubs Tynset IF and IL Nansen. In world championships she has won four individual gold medals along with three gold medals in relays and she is a three-time Olympic medallist. She is currently serving an 18-month suspension for use of banned anabolic steroid clostebol, which ends in April 2018 .
After skiing some domestic races in the 2006 season, Johaug took part at the Norwegian Championships in 2007, winning a bronze at the 7.5 km + 7.5 km double pursuit event. She was selected for two World Cup races prior to the World Championships, finishing eighth and 33rd in two interval start races over 10 km, which was enough to be selected for competition in the 30 km distance at the 2007 Sapporo World Championships where she won a surprising bronze medal.
At the 2010 Winter Olympics in Vancouver, she won gold in the 4 x 5 km relay, came sixth in the 15 km pursuit and seventh in the 30 km mass start (classic) race.