| Political party/group | Dep. | |
|---|---|---|
| Spanish Socialist Workers' Party | 169 | |
| People's Party | 154 | |
| Convergencia i Unió | 10 | |
| Basque Nationalist Party | 6 | |
| Republican Left of Catalonia-United Left-Initiative for Catalonia Greens | 5 | |
| Mixed Group, composed by: BNG, CC, UPyD, NaBai | 6 | |
| Total | 350 | |
The building, Congreso de los Diputados, has a neoclassical style. It was designed by Narcisco Pascual y Colomer, and built between 1843 and 1850. It sits by the Carrera de San Jerónimo, in Madrid.