Anja Eržen (born 26 October 1992) is a retired Slovenian cross-country skier who has been competing since 2006.

Eržen has only two World Cup competitions as of March 2010 with a ninth-place finish in the 4 × 5 km relay in 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.

All results are sourced from the International Ski Federation (FIS).

This biographical article relating to Slovenian cross-country skiing is a stub.