Alexander Nikolayevich Abaza (Russian: Алекса́ндр Никола́евич Абаза́; 4 August 1872 (O.S.) – 6 November 1925) was a Russian diplomat who served as the last Russian consul-general in Australia before the October Revolution of 1917, which brought the Bolsheviks to power. He sometimes used the surname d'Abaza to indicate his nobility.