The Estreichers were a family of notable humanists and scientists from Kraków, Poland, which included:
Dominik Oesterreicher (1750–1809), painter and scholar of fine artsAlojzy Estreicher (1786–1852), botanist and entomologist, Dominik's sonKarol Estreicher (senior) (1827–1908), historian of art and theater, literary critic and bibliographer, Alojzy's sonStanisław Estreicher (1869–1939), historian of law and bibliographer, Karol Senior's sonTadeusz Estreicher (1871–1952), chemist and historian, Karol Senior's sonKarol Estreicher (junior) (1906–1984), historian of law, writer and bibliographer, Stanisław's sonOther people with the same surname include:
Samuel Estreicher (b. 1948), American jurist