Gert-Dietmar Klause (born 25 March 1945) is a former East German cross-country skier who competed at three Olympic Games from 1968 to 1976.

He won a silver medal in the 50 km at the 1976 Winter Olympics in Innsbruck.

[1] Klause won two medals in the 4 x 10 km relay at the FIS Nordic World Ski Championships (gold: 1974, silver: 1970.)

In 1975, he won Vasaloppet as the first and only East German winner.

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