How old can a kangaroo get?

There are over 60 species of kangaroos, and their life span varies according to their species. The larger species live the longest, and their average life expectancy in the wild is 10 - 15 years. In captivity, some species have been said to live to 20 years or more.
They usually have a life span of about 9-18 years, but may live to be up to 28 years old.