Tech Jacket is usually treated as a teenager in the comics, and the best read is that Zack Thompson is around 18 to 19 when he’s operating as Tech Jacket. The character’s exact age is a little fuzzy because the comic timeline is messy, but sources consistently place him in the late-teen range.

Quick Scoop

In the original comics, Zack Thompson starts as a high school student and later is described as a community college dropout, which puts him around late teens to very early 20s by the time of the bigger Invincible events.

In the Invincible TV version, the character is changed to Zoe Thompson, and commentary around the show notes that this version is younger than the comics counterpart.

Simple answer

  • Comics Tech Jacket: about 18–19, give or take.
  • TV show Tech Jacket: younger than the comics version.

If you want, I can also give you a spoiler-light timeline of Tech Jacket’s age across the comics and show.