| Colin Singleton | |
| Protagonist | |
| Age | 17 |
| Gender | Male |
| Hair | brown |
| Allies | Lindsey Lee Wells, Hassan Harbish |
| Fate | Alive |
| Appearances | An Abundance of Katherines |
Colin Singleton is the protagonist and the narrator in the book An Abundance of Katherines.
He is an anagram-loving seventeen-year-old boy who has become depressed because while he has maintained his status of being a prodigy, he has not yet become a “genius". Has always been the dumpie in relationships. Very sensitive boy.