[1] In late Western Han, it covered 26 counties and marquessates: Yingling (營陵), Jukui (劇魁), Anqiu (安丘), Zhi (瓡), Chunyu (淳于), Yi (益), Pingshou (平壽), Ju (劇), Duchang (都昌), Pingwang (平望), Pingdi (平的), Liuquan (柳泉), Shouguang (壽光), Lewang (樂望), Rao (饒), Zhen (斟), Sangdu (桑犢), Pingcheng (平城), Mixiang (密鄉), Yangshi (羊石), Ledu (樂都), Shixiang (石鄉), Shangxiang (上鄉), Xincheng (新成), Chengxiang (成鄉) and Jiaoyang (膠陽).
[2] In early Eastern Han, the neighboring commanderies Zichuan, Gaomi and Jiaodong were merged into Beihai.
The Book of Later Han recorded 7 kings of Beihai: In 140 AD, the kingdom administered 18 counties and marquessates: Ju, Yingling, Pingshou, Duchang, Anqiu, Chunyu, Pingchang (平昌), Zhuxu (朱虛), Dong'anping (東安平), Gaomi (高密), Chang'an (昌安), Yi'an (夷安), Jiaodong (膠東), Jimo (即墨), Zhuangwu (壯武), Xiami (下密) and Ting (挺).
[4] From Cao Wei to Jin dynasties, Beihai's territory was much reduced, as a number of new commanderies including Gaomi, Chengyang (城陽) and Pingchang was created.
In Liu Song dynasty, Beihai covered 6 counties (Duchang, Jiaodong, Ju, Jimo, Xiami, Pingshou) and had a population of 35,995, in 3,968 households.