Mariusz Okoniewski (10 February 1956, in Poznaà  â 10 February 2006, in à Âmigiel) was a Polish motorcycle speedway rider.
Okoniewski won the Team Speedway Polish Championship six times and Polish Silver Helmet in 1976.
His son Rafaà  (born 1980) is also a speedway rider. Rafaà  is the only double Individual U-19 European Champion.
After his racing career he became a coach. Mariusz Okoniewski died on his 50th birthday.