Prince Fedor Ivanovich Mstislavsky (died: 16 December 1622) was a Russian boyar, one of the leaders of the Duma aristocracy, leader of the Seven Boyars (who governed Russia for a brief period between 1610 and 1612) and the Chairman of Zemsky Sobor of 1613.
Prince Mstislavsky became a public servant in 1575, and by the fall of next year he had become a boyar and led a regiment in his father's army.
After the overthrow of Vasili IV in 1610, the political role of Mstislavsky increased.
After the liberation of Moscow from the Poles, Mstislavsky participated in the election of Mikhail Romanov as tsar of Russia.
The Mstislavsky family ended because all the children of Fedor had died in infancy.