Adams County
- Fall Creek Station vicinity, Fall Creek Bridge (HABS IL-267)
- Golden, Exchange Bank, Quincy Street (covenant, EXPIRED)
- Meyer, Lock & Dam 20 Service Bridge Extension Removal (HIER)
- Payson, Congregational Church, Park Drive & State Route 96 (HABS IL-265)
- Payson, Congregational Church Parsonage (HABS IL-266)
- Quincy, Chicago, Burlington & Quincy Railroad, Freight Office, Second & Broadway Streets (HAER IL-10)
- Quincy, Ernest M. Wood Office and Studio, 126 North Eighth Street (HABS IL-339)
- Quincy, Governor John Wood House, 425 South Twelfth Street (HABS IL-188)
- Quincy, Illinois Soldiers and Sailors' Home (Illinois Veterans' Home) (HIBS A-2012-1)
- Quincy, John Wood Mansion, 425 South 12th Street (letter of agreement, EXPIRED)
- Quincy, Knoyer Farmhouse (HABS IL-246)
- Quincy, Lorenzo Bull House, 1550 Maine Street (covenant, EXPIRED)
- Quincy, Quincy Civic Center/Blocks 28 & 39 (HIBS A-1991-1)
- Quincy, Quincy College, Francis Hall, 1800 College Avenue (HABS IL-1181)
- Quincy, Quincy National Cemetery, Thirty-sixth and Maine Streets (HALS IL-5)
- Quincy, St. Mary Hospital, 1415 Broadway (HIBS A-2017-1)
- Quincy, Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 21 (HAER IL-30)
- Quincy, Villa Kathrine, 532 Gardner Expressway (HABS IL-338) (covenant, EXPIRED)
- Quincy, Washington Park (Buildings), Maine, Fourth, Hampshire, & Fifth Streets (HABS IL-1122)