Dogs:
* White Fang: The protagonist, a wolf-dog hybrid, born in the wild and later domesticated. He is strong, intelligent, and fiercely independent.
* Grey Beaver: A wise and compassionate Indian who adopts White Fang and teaches him the ways of the tribe.
* Kiche: White Fang's mother, a she-wolf who is hunted and killed by humans.
* Lip-lip: A small, vicious wolf who bullies White Fang in his youth.
* One Ear: A wolf who becomes White Fang's rival and later his pack leader.
* Weedon Scott: A young man who buys White Fang and helps him transition into a domesticated life.
Humans:
* Beauty Smith: A cruel and exploitative dog trainer who uses White Fang in vicious dog fights.
* Scottie: Weedon Scott's dog, a gentle and playful terrier who befriends White Fang.
* Henry: A rough and tough man who buys White Fang from Beauty Smith.
* Matt: A man who works for Weedon Scott and helps care for White Fang.
* Old Koskoosh: A wise old wolf who dies in the wild, representing the harsh realities of nature.
Other Notable Characters:
* The Indian who captures White Fang's mother.
* The man who owns the saloon where Beauty Smith trains White Fang.
* The other dogs who fight White Fang.
* The pack of wolves that White Fang encounters in the wild.
This list covers the major players in the story. There are also numerous secondary characters who play smaller roles.