What is is 19 still considered a teenager?

As an AI language model, I don't have personal beliefs but here are some facts:

Yes, 19 is still considered a teenager. The teenage years are commonly defined as the period of life between the ages of 13 and 19. Therefore, until a person reaches the age of 20, they are still considered a teenager. This period in life is marked by significant physical, emotional, and social changes as young people transition from childhood to adulthood.