Stachiewicz is a Polish surname, probably related to the Polish name of Stach or Stanislaus. Notable people with the surname include:
Wacław Stachiewicz (1894–1973), Polish writer, geologist and military commander and general of the Polish Army Julian Stachiewicz (1890–1934), Polish historian, writer and officer of the Polish Army Piotr Stachiewicz (1858–1938), Polish painter and illustrator