Mstislav Izyaslavich of Polotsk

Mstislav Izyaslavich (died 1069) was the eldest son of Grand Prince Iziaslav of Kiev. Iziaslav installed him in Novgorod, where he ruled around 1067.

In 1069 he returned to Rus from Poland with his exiled father and was sent to crush the Kiev uprising against Iziaslav, putting it down through mass executions and blindings. Later that year he defeated Prince Vseslav Briachislavich and took Polotsk, but died soon afterwards.