Inalchuq (or Inalchuk) (died 1219) was governor of Otrar in the Khwarezmian Empire in the early 13th century, known mainly for helping to provoke the successful invasion of Khwarezmia by Genghis Khan.
In 1218, a Mongolian trade caravan of around 450 men arrived in Otrar, including an ambassador of Genghis Khan. Inalchuq accused them of being Mongolian spies and arrested them. There may in fact have been spies in the caravan; however Inalchuq may have also been provoked by having been called Inalchuq rather than the less familiar Ghayir-Khan by one of the members of the caravan, or perhaps was motivated by simply wanting to seize the caravan's riches. With the assent of Sultan Muhammed, he executed the entire caravan, and its goods were sold in Bukhara. A camel driver escaped this massacre to report back to Genghis Khan, who responded by sending a delegation to Sultan Muhammad demanding Inalchuq be punished. Muhammad responded by beheading the ambassador and shaving off the beards of his two companions, provoking Genghis Khan's invasion.
Genghis Khan besieged Otrar for five months in 1219, eventually breaching its walls. Inalchuq barricaded himself in its inner citadel, and as the Mongols wished to capture him alive in order to publicly execute him, he managed to hold out another month. Eventually he was trapped with his last remaining bodyguards on the upper floors of the citadel, resorting to throwing bricks down on the Mongols, and was captured and executed.
- Svat Soucek (2002). A History of Inner Asia. Cambridge University Press. p. 106. ISBN 0-521-65704-0.
- Leo de Hartog (2004). Genghis Khan: Conqueror of the World. Tauris Parke. pp. 86–87. ISBN 1-86064-972-6.
- John Man (2007). Genghis Khan: Life, Death, and Resurrection. Macmillan. p. 163. ISBN 0-312-36624-8.