Dobias or Dobiaš is a surname. Notable people with the surname include:
Čeněk Dobiáš (1919–1980), Czech painter Frank Dobias (1902–?), Austrian-born American children's books illustrator Josef Dobiáš (1886–1981), Czech chess player Karol Dobiaš (born 1947), Slovak football player Timon Dobias (born 1989), Slovak football player Václav Dobiáš (1909–1978), Czech composer Vojtěch Dobiáš (born 2000), Czech ice hockey player