Sepp Helfrich (7 July 1900 – 27 January 1963) was an Austrian National Socialist and briefly the Landeshauptman (Governor) of Styria.

He was a member of the Verein Deutscher Studenten (German Student's Club) in Graz while he was in college.

He was immediately released after the Anschluss and was appointed as governor of Steiermark on 12 March 1938.

He was arrested for his National Socialist past in 1945, but did not receive any severe sanction or punishment.

He was active in the Styrian state government in Graz as an Agricultural planner from 1949 to 1963.