The village is mentioned in
Domesday Book as
Turoldesbi. After the Norman invasion the lands were awarded to
Count Alan of Brittany, who granted the local manor to
Bernwulf, who had held the manor before that. The manor was eventually acquired by the lords of
Middleham, whose descent it then followed until the Middleham manor holdings were sold piecemeal by commissioners of the Crown in the mid-17th century. The manor of Thoralby was purchased by the
Norton family. By the middle of the 18th century, it had passed to the
Purchas family. On Thoralby Common the remains of lead mines and quarries are still visible, indicating the industrial past of the area. There has also been a mill here since at least 1298. The toponymy of the village name is derived from combining the
Old Norse words of
Thoraldr, a person's name, and
bi, farm, to give the meaning ''Thoraldr's farm''. ==Governance==