Bihar and Orissa (Hindi: बिहार और उड़ीसा) was a province of British India which included the present-day Indian states of Bihar, Jharkhand, and Odisha. The territories were conquered by the British in the 18th and 19th centuries, and were part of the Bengal Presidency, the largest British province in India. On 1 Apr 1912 both Bihar and Orissa division were separated from the Bengal Presidency as Bihar and Orissa Province. On 1 Apr 1936 Bihar and Orissa became separate provinces.