The Battle of Valdejunquera is a victory for the Islamic Emirate of Córdoba over the Christian armies of the kingdoms of León and Navarre that takes place in a valley called Iuncaria (Junquera) in 920 as part of the Córdoban "Campaign of Muez" (Campaña de Muez), which is directed primarily against the southern line of defenses of the County of Castile along the Duero.

The earliest reference to the battle is found in the Chronicon of Sampiro, a Leonese cleric, written probably in the late 980s.