Władysław Zajączkowski (April 12, 1837 in Strzyżów near the Rzeszów–October 7, 1898 in Lwów) was a Polish mathematician. Professor of Warsaw Main School, Imperial University of Warsaw (now University of Warsaw), Technical Academy in Lviv (now Lviv Polytechnic; twice a rector). Member of Polish Academy of Learning and French Academy of Sciences. He was specialising mainly in mathematical analysis and differential equations.