Southeast Asia is where most black panthers live.
Black Panthers mostly live in the hot, dense tropical rain forests of South and Southeast Asia.
Black Panthers are mainly in Southwestern China, Burma, Nepal, Southern India, Indonesia, and the southern part of Malaysia.
However some black panthers can live in the USA as well.
When I was in Arkansas a few years ago camping and sitting at a picnic table I did see a black panther in Arkansas so it is possible.
I have seen a few other black panthers in other states such as Oklahoma and even in Idaho when I was traveling but most black panthers live in other countries.