Cumberland County Illinois has 3 places on the National Register of Historic Places including 1 place of Statewide significance. Significant places include Cumberland County Courthouse, Greenup Commercial Historic District, Ward, Thornton, Estate.
Some of the country's most noteable architects helped create the Cumberland County places including McDonald Brothers and S.S. Goehring. Prominent architectural styles found in Cumberland Country are Chicago, Italianate and Queen Anne.