Giordano passed away at the Memorial Medical Center in Daytona Beach, Florida on Saturday (03Apr10).
The former executive editor at DC Comics is best known for re-imagining older comic book characters for new audiences, and oversaw projects including The Dark Knight Returns, about an ageing Batman, Green Arrow and Watchmen - adapted for the big screen in 2009.
He left the company in 1971 and co-founded Continuity Associates with artist Neal Adams, supplying commercial artwork to comic book publishers.
He returned to DC Comics in 1980 and retired from his post in 1993.
Giordano is survived by daughters Lisa Giordano-Thomas and Dawn Arrington, a son, Richard Jr., and two grandchildren.