Sangamon County Illinois (Historic Districts) has 9 places on the National Register of Historic Places including 1 place of National significance and 2 places of Statewide significance. Significant places include Lincoln Home National Historic Site, Central Springfield Historic District and Illinois State Fairgrounds, Central Springfield Historic District (Boundary Increase and Additional Documentation) and Central Springfield Historic District (Boundary Increase).
Several famous people are associated with these Sangamon County historic places including Abraham Lincoln, Elijah Enos and Olive Wheeland.
Some of the country's most noteable architects helped create the Sangamon County places including Charles Herrick Hammond, Ossian Cole Simonds, Holabird & Roche and William Saunders. Prominent architectural styles found in Sangamon Country are Classical Revival, Art Deco and Bungalow/Craftsman.