Arrah (Urdu: ارّاہ) is a city and a municipal corporation in Bhojpur district in the state of Bihar, India. The actual name of Arrah is Ara but it was misspelt by the British and now corrected to Ara but still known as Arrah in many records. It is the district headquarters of Bhojpur district, located near the confluence of the Ganges and Sone rivers, some 24 mi. from Danapur and 36 miles from Patna.