Katja Višnar (born 21 March 1984) is a Slovenian, former cross-country skier who competed between 2002 and 2020.

Višnar's best finish at the FIS Nordic World Ski Championships was second in the team sprint event at Seefeld in 2019 in pair with Anamarija Lampič.

On 5 February 2011 she repeated her success at the World Cup finishing second in the sprint in Russia behind her compatriot Vesna Fabjan.

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

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