Tadevos Khachaturi Hakobyan (Armenian: Թադևոս Խաչատուրի Հակոբյան; 15 June 1917 – 15 October 1989) was a Soviet Armenian historian and geographer.
Hakobyan was born in 1917 in the village of Lernadzor, now in Armenia's southern province of Syunik.
In 1940, he graduated from the Faculty of Geography and Geology of Yerevan State University (YSU).
In 1942–43, he fought in the Eastern Front of World War II.
Together with Stepan Melik-Bakhshyan and Hovhannes Barseghyan, he authored the monumental five-volume Dictionary of Toponomy of Armenia and Adjacent Territories (Հայաստանի և հարակից շրջանների տեղանունների բառարան).