The Last: Naruto the Movie: Naruto is 19 years old. This is when the romance becomes official.
The Wedding (Episode 500): Naruto is approximately 20 or 21 years old. when does naruto marry hinata
To understand when the marriage occurs, it is necessary to look at the key milestones leading up to the event: The Last: Naruto the Movie: Naruto is 19 years old