New Mexico Territory's at-large congressional district is an obsolete congressional district representing the New Mexico Territory, which was created in 1850. After New Mexico's admission to the Union as the 47th state by act of Congress on January 6, 1912, this district was dissolved and replaced by New Mexico's at-large congressional district.

Pre-territorial delegate The general boundaries of the territory were established following the Treaty of Guadalupe Hidalgo in 1848, but Congress did not formally organize the territory right away. Despite the uncertain status of the region, political leaders met in September 1849, and elected Hugh N. Smith as its Congressional delegate. Smith presented his credentials to Congress on February 4, 1850, but the House refused to seat him, ruling that no territorial government existed and no authority to elect a delegate had been granted.

List of delegates representing the district On September 9, 1850, following the passage of the Compromise of 1850, New Mexico Territory was officially created by an act of Congress and was given the authority to elect a delegate, the first of which was Richard H. Weightman.

Delegate Party Years Congress Electoral history District established March 4, 1851 Richard H. Weightman Democratic March 4, 1851 –March 3, 1853 Elected in October 1851.Retired. José Manuel Gallegos Democratic March 4, 1853 –July 23, 1856 Elected in 1853.Re-elected in 1855.Lost election contest. Miguel A. Otero Democratic July 23, 1856 –March 3, 1861 Won election contest.Re-elected in 1857.Re-elected in 1859.Retired. John S. Watts Republican March 4, 1861 –March 3, 1863 Elected in 1860.Retired. Francisco Perea Republican March 4, 1863 –March 3, 1865 Elected in 1862.Lost renomination. J. Francisco Chaves Republican March 4, 1865 –March 3, 1867 Elected in 1864Lost re-election. Vacant March 4, 1867 –September 2, 1867 Charles P. Clever Democratic September 2, 1867 –February 20, 1869 Elected in 1886Re-elected in 1868Lost election contest. J. Francisco Chaves Republican February 20, 1869 –March 3, 1871 Elected in 1868.Won election contest to finish the current term.Lost re-election. José Manuel Gallegos Democratic March 4, 1871 –March 3, 1873 Elected in 1870.Lost re-election. Stephen B. Elkins Republican March 4, 1873 –March 3, 1877 Elected in 1872.Re-elected in 1874.Retired. Trinidad Romero Republican March 4, 1877 –March 3, 1879 Elected in 1876. Mariano S. Otero Republican March 4, 1879 –March 3, 1881 Elected in 1878.Retired. Tranquilino Luna Republican March 4, 1881 –March 5, 1884 Elected in 1880.Re-elected in 1882.Lost election contest. Francisco A. Manzanares Democratic March 5, 1884 –March 3, 1885 Won election contest.Retired. Antonio Joseph Democratic March 4, 1885 –March 3, 1895 Elected in 1884.Re-elected in 1886.Re-elected in 1888.Re-elected in 1890.Re-elected in 1892.Lost re-election to Catron. Thomas B. Catron Republican March 4, 1895 –March 3, 1897 Elected in 1894.Lost re-election. H. B. Fergusson Democratic March 4, 1897 –March 3, 1899 Elected in 1896.Lost re-election. Pedro Perea Republican March 4, 1899 –March 3, 1901 Elected in 1898.Retired. Bernard S. Rodey Republican March 4, 1901 –March 3, 1905 Elected in 1900.Re-elected in 1902.Lost renomination. William H. Andrews Republican March 4, 1905 –January 7, 1912 Elected in 1904.Re-elected in 1906.Re-elected in 1908.Re-elected in 1910.Position eliminated. District dissolved January 7, 1912

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