Oleksandr Prokopovych Markevych (Ukrainian: ????????? ?????????? ????????), in English more often Aleksandr Prokofyevich Markevich (Russian: ????????? ??????????? ????????) (19 March 1905 – 23 April 1999) was a Ukrainian zoologist, and a prolific helminthologist and copepodologist.
He was professor and an Academician of the National Academy of Sciences of Ukraine.