Chenjiawa Township is a rural township located in Yu County, Zhangjiakou, Hebei, China. According to the 2010 census, Chenjiawa Township had a population of 5,832, including 3,008 males and 2,824 females. The population was distributed as follows: 1,132 people aged under 14, 3,826 people aged between 15 and 64, and 874 people aged over 65.