Jeffrey Chang is a minor character. His first and only appearance is on page 143 in Diary of a Wimpy Kid: The Ugly Truth. He was the last kid in the Lock-In who had junk food remaining, a bag of cheese puffs and locked himself in the bathroom to try and enjoy his snack. However, the teachers soon found out what he was doing, so in a panic, he started dumping all his cheese puffs into the toilet seat and flushed them.
- Jeffrey is depicted with dark hair, and round glasses. Due to his name (and to a lesser extent, his appearance), he might be of Chinese heritage. He has a white shirt and black shorts, like many other characters.
- Diary of a Wimpy Kid: The Ugly Truth (First and only appearance)