Parliament (Congress) is bicameral and is located in Mexico City.
The Chamber of Deputies has 500 members. 300 members are elected from electoral districts. 200 do not represent a particular electoral district. They are elected to three-year terms by popular vote. The Senate has 128 members, who are elected to six-year terms by popular vote.
Presidents and Heads of State
1822-1823 Emperor Agustín de Iturbide
1824-1829 Guadalupe Victoria (Felix Fernández)
1829-1829 Vicente Guerrero
1829-1829 José María Bocanegra (Interim)
1829-1829 Pedro Vélez, Luis Quintanar, Lucas Alamán (Triumvirate)
1830-1832 Anastasio Bustamante
1832-1832 Melchor Múzquiz (Interim)
1832-1833 Manuel Gómez Pedraza
1833-1835 Antonio López de Santa Anna
1835-1836 Miguel Barragán
1836-1837 José Justo Corro
1837-1839 Anastasio Bustamante (Acting)
1839-1839 Antonio López de Santa Anna (Acting)
1839-1839 Nicolás Bravo
1839-1841 Anastasio Bustamante (Acting)
1841-1841 Javíer Echeverría
1841-1842 Antonio López de Santa Anna (Acting)
1842-1842 Anastasio Bustamante (Acting)
1842-1843 Nicolás Bravo
1842-1842 Anastasio Bustamante (Acting)
1843-1843 Antonio López de Santa Anna (Acting)
1843-1844 Valentín Canalizo
1844-1844 Antonio López de Santa Anna (Acting)
1844-1846 José Joaquín Herrera
1846-1846 Mariano Paredes y Arrillaga
1846-1846 Nicolás Bravo (Acting)
1846-1846 Mariano Salas
1846-1847 Valentín Gómez Farías (Acting)
1847-1847 Antonio López de Santa Anna (Acting)
1847-1847 Pedro María Anaya
1847-1848 Manuel de la Peña y Peña
1847-1847 Antonio López de Santa Anna (Acting)
1848-1851 José Joaquín Herrera (Interim)
1851-1853 Mariano Arista
1853-1853 Juan Bautista Ceballos (Interim)
1853-1853 Manuel María Lombardini
1853-1855 Antonio López de Santa Anna (Acting)
1855-1855 Martín Carréra
1855-1855 Rómulo Díaz de la Vega
1855-1855 Juan Alverez
1855-1958 Ignacio Comonfort
1855-1867 Benito Juárez (Liberal Govt.)
1858-1858 Félix Zuloaga (Conservative Govt.)
1858-1858 Manuel Robles Pezuela (Conservative Govt.)
1859-1859 Félix Zuloaga (Conservative Govt.)
1859-1860 Miguel Miramón (Conservative Govt.)
1860-1860 Ignacio Pavón (Conservative Govt.)
1860-1864 (Conservative Junta)
1864-1867 Emperor Maximilian von Hapsburg (Conservative Govt.)
1867-1872 Benito Juárez
1872-1876 Sebastián Lerdo de Tejada
1876-1876 Juan N. Méndez
1876-1880 Porfirio Díaz
1880-1884 Gen. Manuel González
1884-1911 Porfirio Díaz
1911-1911 Francisco León de la Barra
1911-1913 Francisco Indalécio Madero
1913-1913 Pedro S. Lascuraín Paredes
1913-1914 Victoriano Huerta
1914-1914 Francisco S. Carvajal
1914-1914 Venustiano Carranza
1914-1914 Antonio I. Villarreal González
1914-1915 Eulalio Martín Gutiérrez Ortiz
1915-1915 Roque González Garza
1915-1915 Francisco Lagos Cházaro
1915-1920 Venustiano Carranza
1920-1920 Adolfo de la Huerta
1920-1924 Alvaro Obregón
1924-1928 Plutarco Elías Calles
1928-1930 Emilio Portes Gil (Interim)
1930-1932 Pascual Ortiz Rubio
1932-1934 Abelardo Luján Rodríguez (Interim)
1934-1940 Lázaro Cárdenas
1940-1946 Manuel Avila Camacho
1946-1952 Miguel Alemán
1952-1958 Adolfo Ruiz Cortines
1958-1964 Adolfo López Mateos
1964-1970 Gustavo Díaz Ordaz
1970-1976 Luis Echeverría
1976-1982 José López Portillo
1982-1988 Miguel de la Madrid
1988-1994 Carlos Salinas de Gortari
1994-2000 Ernesto Zedillo Ponce de León
2000-2006 Vicente Fox
2006-2012 Felipe de Jésus Calderon Hinojosa
2012 now Enrique Peña Nieto
