According to About.com, lions usually live together in groups of about five females, two males and their young. Thus, the total number can vary depending on the specific group of lions and how many young they have.
Groups of lions that live together are called prides. They are the only cat species that lives together in a group.
The females, or lionesses, of the pride are related. Female cubs generally continue to live with the same pride as they age. Young male lions, however, eventually leave the group to create their own prides. They do this by taking over another pride from its male leader.