New Mexico Territory

Territory of New Mexico
Organized incorporated territory of the United States
1850–1912
Flag (1896–1908) Seal (1887–1912)
Map of the later Arizona and New Mexico Territories, split from the original New Mexico Territory of 1851, showing existing counties
Capital	Santa Fe
Government
• Type	Organized incorporated territory
Governor
• 1851–1852	James S. Calhoun
• 1910–1912	William J. Mills
Legislature	New Mexico Territorial Legislature
History
• Treaty of Guadalupe Hidalgo	May 30, 1848
• Organic Act (part of Compromise of 1850)	September 9, 1850
• Gadsden Purchase	June 24, 1853
• Colorado Territory established	February 28, 1861
• Arizona Territory established	February 24, 1863
• Statehood	January 6, 1912
Preceded by Succeeded by U.S. provisional government of New Mexico Republic of Texas New Mexico Arizona Territory Colorado Territory Nevada Territory

The Territory of New Mexico was an organized incorporated territory of the United States from September 9, 1850,^[1] until January 6, 1912.^[2] It was created from the U.S. provisional government of New Mexico, as a result of Nuevo México becoming part of the American frontier after the Treaty of Guadalupe Hidalgo. It existed with varying boundaries until the territory was admitted to the Union as the U.S. state of New Mexico. This jurisdiction was an organized, incorporated territory of the US for nearly 62 years, the longest period of any territory in the contiguous United States.