The Eastern States Agency was a political office of the Bengal Presidency of the British Indian Empire. It was created by the merger of the former Chhattisgarh States Agency and the Orissa States Agency in 1933, which remained as subagencies. The Bengal States Agency was added in 1936.
On 1 December 1944 the status of this agency was raised to that of a first class residency. These states were grouped into three political agencies, under the "Resident" in Calcutta. The headquarters of the Orissa States Agency was at Sambalpur, the headquarters of the Chhattisgarh States Agency was at Raipur and the headquarters of the Bengal States Agency was at Calcutta. After the withdrawal of the British from India in 1947, the states acceded to the new Union of India and some of the states formed the Eastern States Union, an organization that failed. Later they were integrated into the Indian states of Madhya Pradesh, Bihar, West Bengal and Orissa. The eastern portion of Madhya Pradesh and the southern portion of Bihar became the states of Chhattisgarh and Jharkhand, respectively, in November 2000.