Madison County Illinois (Historic Districts) has 7 places on the National Register of Historic Places including 4 places of Statewide significance. Significant places include Christian Hill Historic District, Middletown Historic District, Middletown Historic District (Boundary Increase) and Upper Alton Historic District and LeClaire Historic District.
The famous person Col. Samuel Buckmaster is associated with one of more of the Madison County historic places. Prominent architectural styles found in Madison Country are Italianate, Queen Anne and Classical Revival.