Taishan Commandery was created in 122 BC, when the king of Jibei offered the land surrounding Mount Tai to the Han emperor. This region, together with a few counties from Jinan Commandery, formed the basis of Taishan Commandery. In 88 BC, Jibei was abolished, and its territories were merged into Taishan. In late Western Han dynasty, the commandery administered 24 counties: Fenggao (奉高), Bo (博), Cha (茬), Lu (盧), Feicheng (肥成), Yiqiu (蛇丘), Gang (剛), Chai (柴), Gai (蓋), Liangfu (梁父), Dongpingyang (東平陽), Nanwuyang (南武陽), Laiwu (萊蕪), Juping (鉅平), Ying (嬴), Mu (牟), Mengyin (蒙陰), Hua (華), Ningyang (寧陽), Chengqiu (乘丘), Fuyang (富陽), Taoshan (桃山), Taoxiang (桃鄉), Shi (式). The population in 2 AD was 726,604, in 172,086 households.