Sonja Nef (born 19 April 1972) is a Swiss former alpine skier.

[1] The injury made itself felt in the following winter of 2003/04 in a declining level of performance.

Although Nef was able to achieve a podium finish in the slalom for the last time, further good results became rarer.

In the 2005/06 season, an inflammation of her hip gave her a hard time.

Nef was never ranked better than 20th and was unable to qualify for the 2006 Winter Olympics.