John A. Giannetti Jr. (born June 9, 1964) is an American politician and former attorney from Maryland.

He was defeated in the 2006 Democratic primary and general elections by former member of the Maryland House of Delegates and U.S.

He was a partner in the Montgomery County, Maryland law firm Leibowitz, Band & Jezic (2006–2007), and then founded the Law Offices of John Giannetti in Annapolis, Maryland, with offices in Anne Arundel, Prince George's, Howard, and Wicomico Counties.

An April 28, 2017 Circuit Court for Anne Arundel County hearing considered whether Giannetti should be disciplined in the form of a reprimand, suspension or disbarment.

[9] In December 2017, the Maryland Court of Appeals issued a final ruling and suspended Giannetti indefinitely from practicing law.

[14] He resigned as chair and took a hiatus from the committee in June 2017 when news of his prior tax filing issues became known.