As the chronicle of one year in a 13 year old's life, the most important characters in Black Swan Green tend to be the narrator's family and people in his school. Other characters come into play in certain chapters as minor, yet significant roles.
Jason Taylor: 13 year old protagonist and narrator of the story; picked on at school because of his creativity, genuine innocence, and stammer
Michael and Helena Taylor: Jason's parents with whom he has a typical relationship; his mother is a bit brash and sarcastic while his father is more reserved and somewhat distant
Julia: Jason's smart and protective older sister
Ross Wilcox: leader of the bullies at school; a tough-guy who antagonizes Jason with a group of his followers
Dawn Madden: Ross' tom-boyish girlfriend on whom Jason has a secret crush
Madame Eva van Outryve de Crommelynck: an elderly Belgian exile renting the vicarage with her husband; becomes interested in and critiques Jason's poetry