Bella Vista is a city in Benton County, Arkansas. It previously was the largest unincorporated community in the state of Arkansas; however, in November 2006 it voted to incorporate and form a municipality. According to the 2010 U.S. Census the population was 25,250. The geographical size of the city is about 65 square miles (170 km). . The town has two USPS ZIP codes: 72714 on the east side and 72715 on the west side.