Duncan House or Duncan Farm may refer to:
- In Australia
- Duncan House (Castlecrag), a heritage-listed house in Sydney suburb of Castlerag
- In the United States
(by state then city)
- Father William Duncan House, Metlakatla, AK, listed on the NRHP in Alaska
- Duncan House (Harrison, Arkansas), listed on the NRHP in Arkansas
- Hersey-Duncan House, Wilmington, DE, listed on the NRHP in Delaware
- Harry C. Duncan House, Tavarcs, FL, listed on the NRHP in Florida
- Horace Duncan House, Lake City, FL, listed on the NRHP in Florida
- Strange-Duncan House, Carnesville, GA, listed on the NRHP in Georgia
- Duncan Farm (Grafton, Illinois), listed on the NRHP in Illinois
- Smith-Duncan House and Eastman Barn, Grafton, IL, listed on the NRHP in Illinois
- Joseph Duncan House, Jacksonville, IL, listed on the NRHP in Illinois
- Duncan Manor, Towanda, IL, listed on the NRHP in Illinois
- Trippett-Glaze-Duncan Farm, Patoka, IN, listed on the NRHP in Indiana
- John M. Duncan House, Winterset, IA, listed on the NRHP in Iowa
- Duncan-Duitsman Farm Historic District, George, IA, listed on the NRHP in Iowa
- Charles Duncan House, Lawrence, KS, listed on the NRHP in Kansas
- Henry Duncan House, Bloomfield, KY, listed on the NRHP in Kentucky
- Bradshaw-Duncan House, Crestwood, KY, listed on the NRHP in Kentucky
- Duncan House (Franklin, Kentucky), listed on the NRHP in Simpson County, Kentucky
- Duncan House (Greenville, Kentucky), contributing building in South Cherry Street Historic District
- J. W. Duncan House, Nicholasville, KY, listed on the NRHP in Kentucky
- Stuart E. and Annie L. Duncan Estate, Louisville, KY, listed on the NRHP in Kentucky
- Duncan House (Springfield, Kentucky), listed on the NRHP in Washington County, Kentucky
- Beecher H. Duncan Farm, Westfield, ME, listed on the NRHP in Maine
- Andrews-Duncan House, Raleigh, NC, listed on the NRHP in North Carolina
- Robert P. Duncan House, Bexley, OH, listed on the NRHP in Ohio
- Donald C. Duncan House, a Frank Lloyd Wright-designed house in Polymath Park in Acme, Pennsylvania
- Bishop William Wallace Duncan House, Spartanburg, SC, listed on the NRHP in South Carolina
- Wright-Henderson-Duncan House, Granbury, TX, listed on the NRHP in Texas
- Duncan, John, Harriet, and Eliza Jennett, House, Centerville, UT, listed on the NRHP in Utah
- Holland-Duncan House, Moneta, VA, listed on the NRHP in Virginia
If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: