Lajos Thallóczy, (Also, Ludwig von Thallóczy, Ljudevit Taloci, born Ludwig Strommer) (8 December 1857 – 1 December 1916) was a Hungarian historian, archivist and high public servant.
He was a mysterious person of the Austro-Hungarian monarchy who played a very significant role in the Balkans.
Because of his mentors Gyula Andrássy and especially Béni Kállay he became an inevitable counselor in all Balkan affairs even to the emperor Franz Joseph himself, to ministers and to the government of the empire.
He was also a member of the Hungarian Academy of Sciences.