Gräser or Graser is a surname. Notable people with the surname include:
Franz Gräser (1892–1918), Hungarian World War I flying ace Fritz-Hubert Gräser (1888–1960), German military officer Gustav Gräser (1879–1958), German alternative lifestyle advocate, artist, and poet Hulda Regina Graser (1870–1943), Canadian-born American customs house broker Toni Gräser (1933–2022), Swiss racing cyclist