| Longworth House Office Building | |
|---|---|
 The Longworth House Office Building (c. 2004) | |
  Location within Washington, D.C. | |
| General information | |
| Status | Completed |
| Architectural style | Neoclassical |
| Location | United States Capitol Complex |
| Town or city | Washington, D.C. |
| Country | United States |
| Coordinates | 38°53′12.48″N 77°0′30.6″W / 38.8868000°N 77.008500°W |
| Opened | April 1933 |
| Technical details | |
| Material | Marble |
| Grounds | 702,608 square feet (65,274.4 m2) |
| Design and construction | |
| Architect(s) | Frank Upman, Gilbert LaCoste Rodier, Nathan C. Wyeth and Louis Justemente |
| Architecture firm | Allied Architects of Washington |
The Longworth House Office Building (LHOB) is one of five office buildings used by the United States House of Representatives. The building is located south of the Capitol, bounded by Independence Avenue, New Jersey Avenue, C Street S.E., and South Capitol Street, in southeast Washington. It has a floor area of 599,675 square feet (55,711.6 m2) and has a total of 251 congressional offices and suites, five large committee rooms, seven small committee rooms, and a large assembly room now used by the Ways and Means Committee.
The building was named in 1962 in honor of the former Speaker of the House, Nicholas Longworth of Ohio. He served as Speaker from 1925 until Republicans lost their majority in 1931, the same year he died, and the same year the building was authorized.