The City of Butuan is the regional center of Caraga, serving as an administrative region of the Philippines; it is a highly urbanized city. It is located at the northeastern part of Agusan Valley, Mindanao, sprawling across the Agusan River. It is bounded to the north, west and south by Agusan del Norte, to the east by Agusan del Sur and to the northwest by Butuan Bay. According to the 2007 census, it has a population of 298,378 people. The name "Butuan" is believed to have originated from the sour fruit, batuan. Other etymology sources say that it comes from a certain "Datu Buntuan", a chieftain who once ruled over Butuan. Butuan was the capital of Agusan del Norte until 2000 when Republic Act 8811 transferred the capital to Cabadbaran City. However many of the provincial government offices are still located there, including the provincial capitol, as are many the Caraga regional offices of the national government agencies.