The 1990–91 FIS Cross-Country World Cup was the 10th official World Cup season in cross-country skiing for men and women.

The World Cup started in Tauplitzalm, Austria, on 8 December 1990 and finished at Holmenkollen, Oslo, Norway, on 16 March 1991.

Vladimir Smirnov of the Soviet Union won the overall men's cup,[1] and Yelena Välbe of the Soviet Union won the women's.

[2] Note: Until 1999 World Championships, World Championship races are part of the World Cup.

Hence results from those races are included in the World Cup overall.