Duncan House

Duncan House or Duncan Farm may refer to:


 * In Australia
 * Duncan House (Castlecrag), a heritage-listed house in Sydney suburb of Castlerag

(by state then city)
 * In the United States
 * 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