Anja Eržen (born 1992) is a Slovenian cross country skier who has been competing since 2006. At the 2010 Winter Olympics in Vancouver, she finished 15th in the 4 x 5 km relay and 60th in the 7.5 km + 7.5 km double pursuit events.
Eržen has only two World Cup competitions as of March 2010 with a ninth-place finish in the 4 x 5 km relay at Norway in November 2009 and a 56th place finish in a 15 km mass start event in December 2009. She has three victories at lesser events at 5 km in 2009 and 2010.