Ladislaus Freiherr Müller von Szentgyörgy (Hungarian: szentgyörgyi báró Müller László) (18 October 1855 – 14 March 1941) was an Austro-Hungarian diplomat of Hungarian origin serving as ambassador at Tokyo at the outbreak of World War I.
[1] Raised to the nobility in 1896 as Ladislaus Müller von Szentgyörgy, he subsequently served as consul general (with the rank of minister) at Sofia from 1900 to 1904.
Elevated to the rank of a Baron in 1910, he was one of the few products of the 19th century nobility in the Austro-Hungarian diplomatic corps.
[2] On 30 March 1912, Baron Müller von Szentgyörgy was appointed as Ambassador to Japan but returned to Vienna following the Japanese declaration of war against Austria-Hungary on 25 August 1914.
On 4 January 1917, as part of a larger shake-up of personnel at the Ballhausplatz, he was appointed to serve a second term as First Section Chief but was replaced already in June by Baron von Flotow.