Markus Dieckmann (born 7 January 1976 in Bonn) is a retired professional beach volleyball player from Germany who represented his native country at the 2004 Summer Olympics in Athens, Greece. There he ended up in ninth place in the overall-rankings.

Markus Dieckmann
Personal information
Born	7 January 1976 (1976-01-07) (age 48) Bonn, West Germany
Height	6 ft 2 in (188 cm)
Honours Men's beach volleyball Representing  Germany European Championships 2002 Basel Beach 2004 Timmendorfer Strand Beach 2003 Alanya Beach 2005 Moscow Beach

Partnering with Jonas Reckermann he twice won the gold medal at the European Beach Volleyball Championships, in 2002 and 2004. His twin brother, Christoph Dieckmann, also played as a professional beach volleyball player on the international tour.