Blaser or Bläser is a surname. Notable people with the surname include:
Andrew Blaser (born 1989), American skeleton racer Cory Blaser (born 1981), American baseball umpire Gustav Bläser (1813–1874), German sculptor Josef Bläser (born 1952), German footballer Martin J. Blaser (born 1948), American academic Robert Blaser (born 1948), Swiss wrestler Robin Blaser (1925–2009), American author and poet Samuel Blaser (born 1981), Swiss trombonist and composer William L. Blaser (1923–2018), American businessman and politician