Klaus Ostwald (born 26 August 1958) is an East German former ski jumper.

He won the FIS Ski Flying World Championships 1983 in Harrachov.

Ostwald earned two medals in the team large hill at the FIS Nordic World Ski Championships with a silver in 1984 and a bronze in 1985.

His best finish at the Winter Olympics was 13th in the normal hill at Sarajevo in 1984.

On 18 March 1979, at the 5th Ski Flying World Championships, he tied the ski jumping world record distance at 176 metres (577 ft) on Velikanka bratov Gorišek in Planica, Yugoslavia.