Levi Ackerman's age in Attack on Titan varies depending on the point in the story. He was around 22-26 years old in Season 2, which aired in 2017. By the Year 850 in the story timeline (which is the main time setting of much of the series), Levi is approximately 30-33 years old. In later parts of the story, such as Season 4 Part 2, he is in his late 30s. Levi's birthday is listed as December 25, though the birth year is not specified precisely in the series.
So as of the current story timeline in the series, Levi is in his early to late 30s.
