Yellowstone park rangers killed the last wolves there in 1926, and by the middle of the 20th century, the total population in the Lower 48 had been reduced to a few hundred in Minnesota and Michigan.
https://www.nps.gov/yell/learn/historyculture/wolf-managemen...
This map shows how now there are nearly 7,000 in the contiguous states of the USA:
https://nywolf.org/learn/u-s-wolf-populations/