Kwaśniewski (feminine Kwaśniewska, plural Kwaśniewscy) is the surname of:
Aleksander Kwaśniewski (born 1954), Polish politician and journalistAleksandra Kwaśniewska, Polish singer-songwriterDorota Kwaśniewska (born. 1970) - Polish teacher and politician.George Kwasniewski - Polish sociologistJan Kwaśniewski (born 1937), Polish physicianJanina Kwaśniewska (born 1928), Polish female sailorJerzy Kwaśniewski, Polish sociologistJolanta Kwaśniewska (born 1955), Polish lawyer and charity activistKrzysztof Kwaśniewski, Polish sociologistMaria Jadwiga Kwaśniewska-Maleszewska, née Kwaśniewska (1913, Łódź – 2007, Warsaw), Polish athleteMikołaj Kwaśniewski (1871 - 1941), Polish politicianPaweł Kwaśniewski (born 1963), Polish contemporary artist, performerRafał Kwaśniewski (born 1966), Polish rock guitarist/singer, songwriterStanisław Kwaśniewski (1886 - 1956), Brigadier General WPStefan Kwaśniewski (1898 - 1944), journalist, columnist, a member of the Warsaw UprisingWalenty Kwaśniewski (1752 - 1813), Brigadier General WPWłodzimierz Kwaśniewski – official of the Second Republic, connected with LvivZbigniew Kwaśniewski (born 1948), Polish footballer