Ihor Volodymyrovych Mosiychuk (Ukrainian: Ігор Володимирович Мосійчук, born 5 May 1972, Lubny, Poltava Oblast) is a Ukrainian journalist and far-right politician, a leading figure in the organized social-nationalist movement, the editor-in-chief of the newspaper Vechirnaya Vasilkov, and a participant in the Vasylkiv terrorists case.

In early 2014, Mosiychuk served as the deputy commander of the Azov Battalion.

[3] On 25 October 2017, a parked scooter exploded in Kyiv near the building of Espreso TV, which was, according to an investigation by the Ukrainian police, an assassination attempt on him.

Mosiychuk and a political scientist Vitaliy Bala along with another woman were injured.

[5][4] Mosiychuk's Radical Party lost all its parliamentary seats in the 2019 Ukrainian parliamentary election, because it gained about 1%, too little to clear the 5% election threshold, and also did not win an electoral district seat.