What is is 19 still a teenager?

Yes, at 19 years old, a person is still considered a teenager. The term "teenager" refers to individuals whose age ends in "teen," covering the years from 13 to 19. Thus, 19 is the final year of being a teenager before entering the twenties. During this period, many individuals experience late adolescence, which involves continued physical, emotional, and cognitive development as they transition towards adulthood.