Sasuke's age varies throughout the Naruto series.
According to Game Rant, Sasuke's age is as follows:
Series | Age |
---|---|
Naruto Part 1 | 12-13 years |
Naruto: Shippuden | 16-17 years |
Therefore, Sasuke is between 12 and 13 years old in the original Naruto series and between 16 and 17 years old in Naruto: Shippuden.