Marius Runkauskas (born May 20, 1986) is a Lithuanian professional basketball player for BC Gargždai-SC of the Lietuvos krepšinio lyga (LKL).
Runkauskas started his professional basketball career in the Klaipėda, NKL (Lithuanian 2nd Division) team, Nafta-Uni-Laivitė, in 2003.
After he became a champion of the NKL, in 2007, with Nafta-Uni-Laivitė, Klaipėda's strongest basketball club invited him to join their team.
In June 2011, he returned to BC Neptūnas, and signed a two-year contract with the team.
[3] In July 2014, he moved to Romania, and signed a one-year deal with CSU Asesoft Ploiești.