Gregor Rozumovsky, also known as Hryhorii Rozumovskyi (German: Gregor Razumovsky von Wigstein, Ukrainian: Ґреґор Розумовський; born 3 March 1965, Giessen, Germany) is an Austrian historian, political, public and cultural figure of Ukrainian descent, count.

President of the Club for European Understanding and Communication in Vienna (2020),[1] honorary member of the Galician Music Society (2020).

[6] At that time, he took part in the rallies of the People's Movement of Ukraine on Khreshchatyk and met Viacheslav Chornovil and Levko Lukianenko.

[6] In 2018, he donated to the museum in Baturyn the original wagon of Hetman Kyrylo Rozumovsky from 1763 from his family collection.

[12] Since the late 1980s, he has been actively defending and promoting Ukrainian interests in Western European socio-political circles.