The Lancaster Valley AVA is an American Viticultural Area located in Lancaster and Chester counties of southeastern Pennsylvania, centered on the city of Lancaster. The wine region includes 225,000 acres (91,054 ha) in a valley that is roughly 30 miles (48 km) long and 12 miles (19 km) wide, although only 400 acres (162 ha) are planted to grapevines. The Lancaster Valley area is one of the most fertile agricultural areas in Pennsylvania, and features rich topsoil over limestone bedrock.