Franciszek Ksawery Liske (18 October 1838 – 27 February 1891) was a Polish historian, a founder of the Lwów's historical school (lwowska szkola historyczna), a founder and first chairman of the Polish Historical Society (Polskie Towarzystwo Historyczne), director of the Archiwum Krajowe Aktów Grodzkich i Ziemskich we Lwowie.
In 1879-1880 he was Rector of the Lviv University.
He was buried in the Lyczakowski Cemetery.
His students were Oswald Balzer, Wiktor Czermak, Ludwik Finkel, Stanislaw Lukas, Saturnin Kwiatkowski, Antoni Prochaska, Adam Szelagowski.