Bastian is a German short form of Sebastian. As a surname, Bastian may refer to:
- Adolf Bastian, a 19th century anthropologist
- Ali Bastian, an English television actress
- Bruce Bastian, an American computer programmer and businessman
- Fritz Bastian, an American tennis player
- Gert Bastian, a German military officer and politician
- Henry Charlton Bastian, an English physiologist and neurologist
- Mary Bastian, a Tamil Human Rights activist
- Michael Bastian, an American fashion designer
- Noah Bastian, an actor