Ewa Siemaszko (born 27 October 1947) is a Polish writer, publicist and lecturer; collector of oral accounts and historical data regarding the Massacres of Poles in Volhynia.

An engineer by profession with Master's in technological studies from the Warsaw University of Life Sciences, Siemaszko worked in public health education and also as a school teacher following graduation.

She is a daughter of writer Władysław Siemaszko with whom she collaborates and shares strong interest in Polish World War II history.

For her contribution to the monograph Ludobójstwo dokonane przez nacjonalistów ukraińskich na ludności polskiej Wołynia 1939-1945 (Genocide committed by Ukrainian Nationalists in Volhynia 1939–1945)[3] written together with her father Władysław, she received the Józef Mackiewicz Literary Prize and medal in 2002.

However, Marples also noted that Ilyushin failed to reach a reasonable conclusion in his article and made no distinction between Ukrainian atrocities committed against officials and innocent civilians; men, women and children.