Poznańska is a surname. Notable people with the surname include: Sophia Poznańska (1906-1942), Polish-Jewish resistance worker Alicja Poznańska (1930-1990, married name Alice Parizeau), Polish-Canadian writer Hanna Poznańska, (1918-2011, married name Hanna Segal), British psychoanalyst
See also Prowincja Poznańska or Province of Posen, province of Prussia from 1848 to 1919 AZS Politechnika Poznanska, field hockey team