With a total area of about 0.5 sq. miles, Millville is a town of Sussex County in the state of Delaware. The town is a part of the MSA, Seaford. Millville lies within the area of Baltimore Hundred. The town was earlier famous for its lumbering industries, agro products and commercial fishing. With the location of a large number of mills, the town got its name Millville. Though they are now few in number, it is the principal source of income for the local residents of Millville.