The majority of tree kangaroo species are native to Papua New Guinea, particularly on the Huon Peninsula in the northeastern part of the country. Tree kangaroos are also found on the continent of Australia and in the province of West Papua.
There are 10 firmly identified species of tree kangaroo, as of 2014, and Papua New Guinea is home to six of them.
Tree kangaroos exclusively live in rain forest habitats. They are most commonly seen in areas of high elevation, choosing areas that may be in excess of 10,000 feet above sea level. The diet of tree kangaroos largely consists of leaves from the trees that they occupy. Captive tree kangaroos live up to 20 years.