The Prince of Moscow, later known as the Grand Prince of Moscow, was the title of the ruler of the Principality of Moscow, initially a part of the grand principality of Vladimir-Suzdal. By the late 14th century, the grand principality was inherited by the prince of Moscow; the monarch bore the title of grand prince of Vladimir and Moscow and later the title of grand prince of Vladimir, Moscow and all Russia.

The Principality of Moscow or Grand Duchy of Moscow, also known simply as Muscovy, was a principality of the Late Middle Ages centered on Moscow. It eventually evolved into the Tsardom of Russia in the early modern period. The princes of Moscow were descendants of the first prince Daniel, referred to in modern historiography as the Daniilovichi, a branch of the Rurikids.