Bier is a German surname, meaning "beer". Notable people with the surname include:
August Bier (1861–1949), German surgeon and pioneer of anesthesiology Jasmina Bier (born 1997), German pararower Martin Bier (1854–1934), German chess player Steven Bier Jr. (born 1964), former stage name Madonna Wayne Gacy, former keyboard player for Marilyn Manson Susanne Bier (born 1960), Danish film director Vicki Bier, American systems engineer and decision analyst