The King's Name is a fantasy novel by Welsh-Canadian writer Jo Walton, published by Tor Books in October 2001.

A prequel, The Prize in the Game, was published in 2002.

Sulien ap Gwien, a woman warrior and the ruler of a small part of the island of Tir Tanagiri, finds herself unwillingly drawn into a civil war that pits brother against brother and sister against sister.

After surviving an attempted poisoning, she discovers that the sorcerer Morthu, an old enemy, is stirring up discontent and rebellion against her friend the High King.

Sulien must bring together an unlikely group of allies and do battle in both the physical and the spiritual world to defeat the sorcerer and restore the rule of law.