| Langworthy House | |
| Nrhp Type: | indcp |
| Nocat: | yes |
| Partof Refnum: | 86002102 |
| Coordinates: | 42.4954°N -90.6792°W |
| Built: | 1856 |
| Added: | October 14, 1975 |
| Refnum: | 75000685 |
The Langworthy House, also known as the Octagon House, is a historic building located in Dubuque, Iowa, United States. Built in 1856, it was designed by local architect John F. Rague for local politician Edward Langworthy.[1] The two-story brick home features tall windows, a columned entry, and a windowed cupola.[2] Langworthy and three of his brothers were among the first settlers in Dubuque.[3] They were partners in a lead mine, helped to build the territorial road between Dubuque and Iowa City, they farmed, invested in real estate, and they owned a steamboat and a mercantile exchange. The house has been passed down through Langworthy's descendants.[3] It was individually listed on the National Register of Historic Places in 1975, and it was included as a contributing property in the Langworthy Historic District in 2004.[4]