Mstislaw or Mstislavl (Belarusian: Мсціслаў, romanized: Mscislaŭ, IPA: [msʲt͡sʲiˈsɫau̯] ⓘ; Russian: Мстиславль, IPA: [msʲtʲɪˈslavlʲ];[2][3] Polish: Mścisław, Lithuanian: Mstislavlis) is a town in Mogilev Region, Belarus.

In the Middle Ages, it was the seat of the Mstislavsky princely family.

In 1377, the town joined the Grand Duchy of Lithuania with the free will of its residents.

The town remained part of the Polish–Lithuanian Commonwealth under the Mścisław Voivodship until the Partitions of Poland in 1772.

[5] The town is the birthplace of Jewish historian and writer Simon Dubnow, Jewish statesman and Communist politician Yakov Chubin, and expressionist artist Abraham A. Manievich, among others.