Krupinski or Krupiński (feminine: Krupińska) is a Polish surname. It may also be transliterated into other languages as Krupinsky.
People with the name include: Franciszek Krupiński (1836–1898), Polish philosopher Jerry W. Krupinski (contemporary), American politician from Ohio; state legislator Józef Krupiński (1930–1998), Polish poet Eileen Krupinski (contemporary), American politician from Ohio; state legislator Emil Krupa-Krupinsky (Krupinski) (1872- 1924), German painter Michał Krupiński (born 1981), Polish economist and government minister Paulina Krupińska (born 1987), Polish beauty pageant titleholder Walter Krupinski (1920–2000), German Luftwaffe fighter ace of World War II Waltrud Krupinski, a fictional character from the anime/manga Strike Witches