John B. O'Reilly Jr.
 John B. Jack O'Reilly Jr. is the mayor of Dearborn Michigan. A Democrat he previously served for 17 years on the Dearborn City Council. He serves in a Strong Mayor-Council type of municipal government.He entered the mayoralty on the passing of mayor Michael Guido. He won a special election and became sworn in as a full mayor on February 27 2007.His family background includes an elected official. His father John B.