Iziaslav II Mstislavich (Ukrainian: Ізяслав Мстиславич, Russian: Изяслав II Мстиславич; c. 1096 – 13 November 1154), was the oldest son of Mstislav Vladimirovich, (Prince of Novgorod), and Christina Ingesdotter of Sweden. He was baptized as Panteleimon. Izyaslav is considered to be progenitor of the Monomakhovychi Volhynian branch.
Izyaslav held following offices Prince of Pereyaslav (1132), Prince of Turov (1132–1134), Prince of Rostov (1134– ), Prince of Volhynia (1134–1142), Pereyaslavl (1143–1145), Velikiy Kniaz (Grand Prince) of Kiev (1146–1149 and 1151–1154).
His first wife was Agnes, daughter of King Conrad III of Germany, who took the name Liubava after her marriage. She died in 1151. Their children were:
Iziaslav's second wife was Rusudan (or Bagrationi) daughter of King Demetrius I of Georgia, but they were married for only a few months in 1154 before his death. After the death of her husband, the wife returned to Georgia.