The Arizona Game and Fish Department announced Thursday that the animal was found dead last month in eastern Arizona.
The wolf was a member of the Rim Pack and Maverick Pack, but the agency did not provide any other details.
Game and Fish officials say the case is under investigation.
Efforts to reintroduce the predators to parts of New Mexico and Arizona have been hampered over the years by illegal shootings, among other things.
The endangered wolves currently roam about 7 million acres of federal, tribal and private land in far eastern Arizona and western New Mexico.