Until what age does adolescence last? Adolescence is generally divided into three stages, with the upper age limit varying slightly based on different sources. Here’s a breakdown based on the provided context and general knowledge: Early Adolescence: Ages 10–14 (Grades 5–9). Middle Adolescence: Ages 15–17 (Grades 9–12). Late Adolescence/Early Adulthood: Ages 18–24 (Post-high school years). … Continue reading Until what age does adolescence last?