Maine Coon Lover Maine Coons are lovable, intelligent, and very sociable creatures that make excellent pets for any household. But how long do they live? They have an average life expectancy that ranges from 12-16 years, they can also live up to 20 years, which is much longer than other breeds. Many different factors can affect the life expectancy of a Maine Coon Cat. Factors such as genetics, diet, and environment all play an important role in how long they live. There are many things you can do to keep your furry friend happy and healthy longer!