West Virginia has them and so does eastern Kentucky. Some are unbranded/unclaimed and some are privately owned. They’re not federally protected.
Stallions have joined the herds in Kentucky and populations are growing, according to a story posted this morning by WHAS-TV of Louisville.
Volunteers with a nonprofit care for sick and injured animals, Their history page says the horses have been roaming in a nine-county area for at least 30 years, some on reclaimed lands after the mines were closed.
Horses in Floyd county had to be evacuated in late 2019 after 21 were shot dead.
UPDATE: Added video.
Western Horse Watchers Association 