The Ashfield Plain Historic District is a historic district roughly, along Main and South Streets and adjacent parts of Buckland and Norton Hill Roads in Ashfield, Massachusetts. Among the buildings included in the district is Ashfield's Town Hall, which was built in the 1810s to house the First Congregational Church. While still in use by the congregation the building was moved 0.5 miles (0.80 km) down a steep hill to its present location. In 1870 the building was sold to the town, and adapted for use as town hall. The district was listed on the National Register of Historic Places in 1991.