Sir Francis Oswald Lindley GCMG CB CBE PC (12 June 1872 – 17 August 1950) was a British diplomat who was HM Consul-General in Russia in 1919, British High Commissioner in Vienna 1919–1920, Ambassador to Austria 1920–1921, Ambassador to Greece 1922–1923, Minister in Oslo 1923–1929, Ambassador to Portugal 1929–1931, and finally Ambassador to Japan 1931–1934. Lindley was described as "a rather tough old character in some respects and very outspoken in his likes and dislikes."