Morty Smith is usually described as being 14 years old. He is portrayed as a nervous, good-natured teenager who attends high school while being repeatedly pulled into dangerous interdimensional adventures by his grandfather, Rick Sanchez. His age places him at the center of the show’s contrast between adolescent uncertainty and Rick’s reckless, world-weary confidence.
Morty’s exact age can feel complicated because the series involves alternate dimensions, time-related jokes, clones, and characters whose lives do not always progress normally. Nevertheless, the standard character description identifies Morty as 14, making that the canonical answer for a straightforward trivia question. He is generally shown as younger than his sister Summer, who is a teenager with greater social confidence and independence.
Morty’s age also explains many of the show’s recurring conflicts. He is still dependent on his parents, Jerry and Beth Smith, yet Rick treats him as a companion on missions involving aliens, monsters, political crises, and alternate realities. The tension between Morty’s youth and the adult-scale dangers around him is one of the series’ central comic and dramatic engines.