Duncan House
- Acme, Pennsylvania
- Andrews-Duncan House
- Beecher H. Duncan Farm
- Bishop William Wallace Duncan House
- Bradshaw-Duncan House
- Charles Duncan House
- Donald C. Duncan House
- Duncan Farm (Grafton, Illinois)
- Duncan House (Castlecrag)
- Duncan House (Franklin, Kentucky)
- Duncan House (Harrison, Arkansas)
- Duncan House (Springfield, Kentucky)
- Duncan Manor
- Duncan, John, Harriet, and Eliza Jennett, House
- Duncan-Duitsman Farm Historic District
- Father William Duncan House
- Frank Lloyd Wright
- Harry C. Duncan House
- Henry Duncan House
- Hersey-Duncan House
- Holland-Duncan House
- Horace Duncan House
- J. W. Duncan House
- John M. Duncan House
- Joseph Duncan House
- List of RHPs in AK
- List of RHPs in DE
- List of RHPs in GA
- List of RHPs in IA
- List of RHPs in IL
- List of RHPs in IN
- List of RHPs in KS
- List of RHPs in KY
- List of RHPs in ME
- List of RHPs in NC
- List of RHPs in OH
- List of RHPs in SC
- List of RHPs in TX
- List of RHPs in UT
- List of RHPs in VA
- National Register of Historic Places listings in Arkansas
- National Register of Historic Places listings in Simpson County, Kentucky
- National Register of Historic Places listings in Washington County, Kentucky
- Polymath Park
- Robert P. Duncan House
- Smith-Duncan House and Eastman Barn
- Strange-Duncan House
- Stuart E. and Annie L. Duncan Estate
- Trippett-Glaze-Duncan Farm
- Wright-Henderson-Duncan House
