Martin Toporek (born 15 February 1961 in Vienna) is an Austrian racewalker.
He represented his country at two consecutive Summer Olympics, in 1980 and 1984.
In addition, he won a bronze medal at the 1982 European Indoor Championships.
In 1996 he tested positive for illegal stimulants substances, Methylephedrin, Ephedrin, und Pseudoephedrin, and was banned for three months.