"We are very pleased to finalize this agreement with Mike," Packers General Manager Ted Thompson said in a statement. "He's a good football coach, a good leader and a good man."
McCarthy had two years remaining on his current contract and the Milwaukee-Wisconsin Journal Sentinel said the extension was for three more years.
"We were very excited to bring the Lombardi Trophy back home this past season, and we look forward to the challenge of continuing to improve as a football team and adding to the championship legacy here," said McCarthy.
(Reporting by Simon Evans in Miami; Editing by Frank Pingue; To query or comment on this story email firstname.lastname@example.org)