Osvaldas Matulionis (born August 19, 1991) is a Lithuanian professional basketball player for Fibwi Palma of the Primera FEB. He plays in the small forward position. He played for the Lietuvos rytas Vilnius youth system between 2007 and 2009.
In 2013, Matulionis arrived in Spain to play at Força Lleida of the Spanish second division. Two years later, he agreed to terms with Cafés Candelas Breogán for one season.
On September 20, 2016, Matulionis signed a one-month contract with RÃÂo Natura Monbús Obradoiro for making his debut at Liga ACB.
On November 13, 2017, Matulionis was introduced at the Brazilian's champion Bauru Basket from NBB.
On July 19, 2018, Matulionis signed with RETAbet Bilbao Basket of the LEB Oro.
On July 4, 2024, he signed with Fuenlabrada of the Primera FEB.