Adams County Illinois (Historic Districts) has 7 places on the National Register of Historic Places including 2 places of National significance and 2 places of Statewide significance. Significant places include Lock and Dam No. 21 Historic District, South Side German Historic District, Downtown Quincy Historic District and Quincy East End Historic District and Quincy Northwest Historic District.
Some of the country's most noteable architects helped create the Adams County places including COE, Abbott, Edwin E., et al., John Wood, Harvey Chatten, Martin Geise and George Behrensmeyer. Prominent architectural styles found in Adams Country are Late 19th And Early 20th Century American Movements, Late Victorian and Italianate.