Rosenblatt is a surname of German origin, meaning "rose leaf". People with this surname include:
Albert Rosenblatt (born 1936), New York Court of Appeals judge
Dana Rosenblatt, known as "Dangerous" (born 1972), American boxer
Frank Rosenblatt (1928–1971), American computer scientist
Gary Rosenblatt (born 1947), American journalist
Jay S. Rosenblatt (1923–2014), American psychologist and animal behavior researcher
John R. Rosenblatt (1907–1979), mayor of Omaha, Nebraska
Jonathan Rosenblatt (born 1956), American Rabbi
Louise Rosenblatt (1904–2005), American literary critic
Murray Rosenblatt (born 1926), American statistician
Paul Gerhardt Rosenblatt (born 1928), American judge
Richard Rosenblatt (born 1969), American businessman
Roger Rosenblatt (born 1940), American journalist, author, playwright and teacher
Rose Rosenblatt (born 1947), American film director
Sultana Levy Rosenblatt (1910–2007), Brazilian writer
Susan Rosenblatt, later Susan Sontag (1933–2004), American author, filmmaker, philosopher, literary theorist and political activist
Therese Steinhardt Rosenblatt (1896–1920), American painter
Wibrandis Rosenblatt (1504–1564), German Christian active in the Protestant Reformation
William Rosenblatt (1906–1999), New York state senator
Yossele Rosenblatt (1882–1933), Ukrainian-born Jewish cantor