Arendt is a surname. Notable people with the surname include:
Aleksander Arendt (20th century), president of Kashubian-Pomeranian Association
Hannah Arendt (1906–1975), German Jewish political theorist
Gisela Arendt (1918–1969), German swimmer
Helga Arendt (1964–2013), German sprinter
Nicole Arendt (born 1969), American tennis player
Ronny Arendt (born 1980), German professional ice hockey player
Walter Arendt (1925–2005), German politician