Jersey County Illinois (Historic Districts) has 6 places on the National Register of Historic Places including 2 places of National significance and 2 places of Statewide significance. Significant places include Elsah Historic District, Principia College Historic District, Elsah Historic District and New Piasa Chautauqua Historic District and Grafton Historic District.
Some of the country's most noteable architects helped create the Jersey County places including Bernard Maybeck, Henry Gutterson and Henry Elliot. Prominent architectural styles found in Jersey Country are Italianate, Bungalow/Craftsman and Colonial Revival.