Meckley Mingo is one of the Mingo kids, as well as being the leader. He is a minor antagonist in the 8th book, Hard Luck. He has only been shown personally one time at the end of the book, chasing Greg Heffley and Rowley Jefferson. His belt also appears in the first page.
- Meckley, as described by Greg, "always wears a tank top and a belt with a metal buckle." His stature is noticed while he is chasing Greg and Rowley, he appears to be quiet tall and looks overweight.
- Not much is known about Meckley, but he is most likely cruel and short-tempered.
- Diary of a Wimpy Kid: Hard Luck (First and only appearance)