The Agency was formed in 1818 at the conclusion of the Third Anglo-Maratha War, and covered the princely states of Bhopal (largest and eponymous), Khilchipur, Kurwai, Narsingarh, Muhammadgarh, Pathari and Rajgarh surrounding Bhopal, as well as the districts of Bhilsa and Isagarh, which belonged to the Gwalior State and also the district of Sironj, which belonged to Tonk State in Rajputana.