Bagrat Arshaki Ulubabyan (Armenian: Բագրատ Արշակի Ուլուբաբյան; Russian: Баграт Аршакович Улубабян; December 9, 1925 – November 19, 2001) was an Armenian writer and historian, known most prominently for his work on the histories of Nagorno-Karabakh and Artsakh.