|Full name||Δημήτριος Μαστροβασίλης|
|Born||12 June 1983|
|Peak rating||2631 (January 2012)|
Dimitrios Mastrovasilis (Greek: Δημήτριος Μαστροβασίλης; born 12 June 1983) is a Greek chess Grandmaster.
In 2004 he tied for 1st-2nd with Kiril Georgiev at Topola. In 2007 he tied for 2nd-7th with Kiril Georgiev, Vadim Malakhatko, Mircea Parligras, Hristos Banikas and Dmitry Svetushkin in the Acropolis International Chess Tournament. In 2012 he won the Artemis Cup in Leros.
He played for Greece in the Chess Olympiads of 2000, 2004, 2006, 2008, 2010, 2012 and 2014.
His brother is Grandmaster Athanasios Mastrovasilis.