I can tell you that Joe's age is a topic that pops up a lot in discussions. In the book 'You' by Caroline Kepnes, Joe Goldberg is initially portrayed as a young man in his late 20s, around 27 to 29 years old, depending on the timeline. The series adaptation on Netflix keeps this pretty consistent, showing him as a bookstore manager who's definitely in that age range.
What's interesting is how his age plays into his character. Being in his late 20s, Joe has that mix of youthful energy and the beginnings of adult weariness, which makes his obsessive tendencies even more unsettling. The way he navigates relationships and his career feels very much like someone who's not quite settled into adulthood but is old enough to know better. It's a fascinating dynamic that adds depth to his character.