Belknap County New Hampshire (Vacant / Not In Use) has 3 places on the National Register of Historic Places including 2 places of National significance and 1 place of Statewide significance. Significant places include Belknap--Sulloway Mill, Busiel--Seeburg Mill and Kimball Castle.
The famous person Benjamin A. Kimball is associated with one of more of the Belknap County historic places. Prominent architectural styles found in Belknap Country are Shingle Style.