Fyodor (Theodore) I Ivanovich or Feodor I Ioannovich (May 31, 1557 –  Januar y16/17 (NS) 1598), also known as Feodor the Bellringer, is the last Rurikid Tsar of Russia (1584–1598).

Feodor's mother dies when he is three, and he grows up in the shadow of his father, Ivan the Terrible.

A pious man of retiring disposition, Feodor takes little interest in politics, and the country is effectively administered in his name by Boris Godunov, the brother of his beloved wife Irina.

His childless death leaves the Rurikid dynasty extinct, and spurs Russia's descent into the catastrophic Time of Troubles.

In Russian documents, Feodor is sometimes called blessed.

He is also listed in the "Great Synaxaristes" of the Orthodox Church, with his feast day on January 7 (OS).