Langworthy House

{{short description|Historic house in Iowa, United States}}

{{Use mdy dates|date=February 2025}}

{{Infobox NRHP | name =Langworthy House

| nrhp_type = indcp

| nocat = yes

| partof = Langworthy Historic District

| partof_refnum = 86002102

| image = Langworthy House.jpg

| caption = Southern front of the house

| location= 1095 W. 3rd St.
Dubuque, Iowa

| coordinates = {{coord|42|29|43.6|N|90|40|45|W|display=inline,title}}

| locmapin = Iowa#USA

| area =

| built = 1856

| architect = John F. Rague

| architecture = Octagon Mode

| added = October 14, 1975{{NRISref|2008a}}

| mpsub =

| 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.[http://www.octagon.bobanna.com/IA.html Octagon Inventory: Dubuque County, Iowa] The two-story brick home features tall windows, a columned entry, and a windowed cupola.{{cite web| last = Travis|first=Dale|title=Iowa Round Barns List|date=March 10, 2008|url=http://www.dalejtravis.com/rblist/rbia.htm|accessdate=2008-06-20}} Langworthy and three of his brothers were among the first settlers in Dubuque.{{cite web|url={{NRHP url|id=75000685}}|title=Octagon House|publisher=National Park Service|accessdate=2017-01-04|author=Mrs. Keith Malone}} with {{NRHP url|id=75000685|photos=y|title=photos}} 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. 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.{{cite web|url={{NRHP url|id=04000813}}|title=Langworthy Historic District|publisher=National Park Service|accessdate=2017-01-04|author=James E. Jacobsen}} with {{NRHP url|id=04000813|photos=y|title=photos}}