Lubei is a district of Tangshan, a city in Hebei Province, China. It is one of the administrative divisions that make up the urban core of Tangshan, located in the northern part of the North China Plain.
According to the 2010 census, Lubei District had a population of 743,504. The district forms part of the larger Tangshan metropolitan area, which is a major industrial region in northern China.
As a district-level administrative unit, Lubei functions under the municipal government of Tangshan. Its name, meaning "north of the Lu River," reflects its geographic position relative to the river that runs through the area.