Gray wolves (Canis lupus) are not rare at the global species level. Conservation references summarizing the IUCN Red List treat the grey wolf as Least Concern because the species remains widespread, with worldwide population estimates often placed in the hundreds of thousands of individuals.
Regionally, the picture is different: wolves were wiped out across much of the contiguous United States and remain scarce or legally protected in many areas, and some subspecies—such as the Himalayan and Indian wolves—are assessed as Vulnerable. So globally gray wolves are not a rare species, but locally and for certain subspecies they can be uncommon and heavily managed.
Source: San Diego Zoo Wildlife Alliance Library — Gray Wolf Fact Sheet: Population & Conservation Status