Krzyżanowski (feminine Krzyżanowska) is a Polish surname. Notable persons with that name include:
Adam Krzyżanowski, Polish economist, former director of the Polish Academy of Learning
Adrian Krzyżanowski (1788–1852), Polish mathematician
Aleksander Krzyżanowski (1895–1951), Polish military officer
Halina Krzyżanowska (1860–1937), Polish composer
Konrad Krzyżanowski (1872–1922), Polish painter
Rudolf Krzyzanowski (1859–1911), Austrian composer, pupil of Anton Bruckner
Tadeusz Krzyżanowski (1920–1987), Polish athlete
Włodzimierz Krzyżanowski (1824–1887), Polish engineer and military leader
Irena Sendler, née Krzyżanowska