Harmon House
- Harmon–Neils House
- National Register of Historic Places listings in Ashtabula County, Ohio
- National Register of Historic Places listings in Carbon County, Utah
- National Register of Historic Places listings in Floyd County, Kentucky
- National Register of Historic Places listings in Orange County, California
- National Register of Historic Places listings in Phoenix, Arizona
- National Register of Historic Places listings in Shawnee County, Kansas
- Southwick-Harmon House
- William Harmon House (Lima, New York)
- William Harmon House (Miles City, Montana)