Oleksandr Oleksiyovych Lukyanchenko (Ukrainian: Олександр Олексійович Лук'янченко, Russian: Александр Алексеевич Лукьянченко; born 30 August 1947) is the de facto former mayor of the city of Donetsk, Ukraine.

He was born to a Russian-speaking Ukrainian family in the village of Berdychi, in Donetsk Oblast.

In 1962, he entered the Makiivka Civil Engineering Institute, and then served in a tank corps in the Soviet Army.

He was nominated vice-mayor of Donetsk city, under Volodymyr Rybak, who he replaced as mayor in 2002 after 31 March municipal elections.

Lukyanchenko has criticised separatists affiliated with the Donetsk People's Republic and the post-Euromaidan Ukrainian government.