Ronald Barnabas Schill (born 23 November 1958) is a former German judge, the founder of the German political parties Party for a Rule of Law Offensive (Partei Rechtsstaatlicher Offensive; also called PRO or "Schill party") and Pro DM/Schill.
He served as the Senator of the Interior and Second Mayor (deputy chief of government) in the government of Hamburg from 2001 to 2003.