La Salle County Illinois (Vacant / Not In Use) has 4 places on the National Register of Historic Places including 2 places of Statewide significance. Significant places include Hegeler I, Julius W., House and Williams, Silas, House, Armour's Warehouse, Hotel Kaskaskia Buildings (Boundary Increase).
Some of the country's most noteable architects helped create the La Salle County places including Allen Bartlit Pond, Irving Kane Pond and Marshall and Fox. Prominent architectural styles found in La Salle Country are Bungalow/Craftsman, Colonial Revival and Queen Anne.