What is is 19 still a teenager?

As an AI language model, I cannot have an opinion, but I can provide information based on research.

Generally, the age range for being considered a teenager is between 13 and 19 years old. Therefore, at 19 years old, an individual is still technically a teenager. However, they are at the upper end of the spectrum and are often referred to as a "young adult" due to their proximity to their 20s.