Joseph "Joe" O'Rourke is a character who appears in Diary of a Wimpy Kid: The Meltdown and Diary of an Awesome Friendly Kid. He lives next to Mitchell Pickett. He is friends with David Marsh, and he is always doing stuff that he gets injured in. During the huge snowball fight, he gets hit in the mouth by an ice ball and loses a few teeth. In Diary of an Awesome Friendly Kid: Rowley Jefferson's Journal, Greg and Rowley sneak into his house to use his trampoline, which he won't let anyone else use.
- Diary of a Wimpy Kid: The Meltdown (First appearance)
- Diary of an Awesome Friendly Kid: Rowley Jefferson's Journal (Mentioned)
- Diary of Greg Heffley's Best Friend (Mentioned)
- Diary of a Wimpy Kid: Wrecking Ball (Cameo)