Where do tigons live?

Zoos, primarily. Tigons are not found in the wild, same with ligers or any hybrid animal only able to be created by human intervention.
A tiglon is the rare hybrid offspring of a male tiger and female lion. Tigers generally range naturally in Asia, including India, while lions generally range naturally in Africa and India. Therefore, tiglons would generally exist naturally where the range of these two species overlap - in India. Also, some zoos breed for these hybrids, so they do exist in captivity in other parts of the world.