Stefan Kaiser (born 15 February 1983) is an Austrian ski jumper.
In the World Cup he finished twice among the top 10, with a seventh place from Oberstdorf in December 2000 as his best result.
He finished third overall in the 2003/04 season of the Continental Cup.
He was a record holder of the longest jump at Pine Mountain ski jump.
This biographical article relating to Austrian ski jumping is a stub.