Ina Marciulionyte (born 1963) is the Ambassador and Permanent Delegate of the Republic of Lithuania to UNESCO at the headquarters in Paris and has served in that post since 2003.
Since 2007, she also serves as Vice-President of the UNESCO Executive Board.
Since September 2015, Marciulionyte is Lithuanian Ambassador in Beijing (People's Republic of China).
In 2009, she was jointly nominated by Lithuania, Estonia and Latvia as a candidate to the post of UNESCO Director-General.