Dadashov, Dadasov or Dadashev (Azerbaijani: Dadaşov, Russian: Дадашев) is an Azerbaijani masculine surname, its feminine counterpart is Dadashova, Dadasova or Dadasheva. It is a patronymic surname used by descendants of people named Dadash. People with this surname include:
Aydin Dadashov (1952–2016), Azerbaijani film critic, director and academic Brilliant Dadashova (born 1959 or 1965), Azerbaijani pop singer Ibrahim Dadashov (1926–1990), Azerbaijani wrestler Maharram Dadashev (1912–1944), Azerbaijani soldier Malik Dadashov (1924–1996), Azerbaijani actor Manuvakh Dadashev (1913–1943), Soviet Jewish poet Maxim Dadashev (1990–2019), Russian boxer Mikhail Dadashev (born 1936), Soviet and Russian Jewish writer Milana Dadasheva (born 1995), Russian freestyle wrestler Mukhtar Dadashov (1913–1998), Soviet Azerbaijani actor, director and screenwriter Murad Dadashov (born 1978), Azerbaijani TV host, producer and actor Renat Dadaşov (born 1999), Azerbaijan national team footballer Rufat Dadashov (born 1991), Azerbaijani football striker Sadig Dadashov (1905–1946), Azerbaijani architect and architecture historian