Outline of Wyoming territorial evolution

The following outline traces the territorial evolution of the U.S. State of Wyoming.

An enlargeable map of the United States after the Constitution of the United States was ratified on March 4, 1789.
An enlargeable map of the United States after the secret Third Treaty of San Ildefonso transferred the Spanish colony of la Luisiana to the French Republic on October 1, 1800.
An enlargeable map of the United States after the Louisiana Purchase took effect on December 20, 1803.
An enlargeable map of the United States after the creation of the District of Louisiana on March 26, 1804.
An enlargeable map of the United States after the creation of the Territory of Louisiana on March 3, 1805.
An enlargeable map of the United States after the creation of the Territory of Missouri on June 4, 1812.
An enlargeable map of the United States after the Treaty of 1818 took effect on October 20, 1818.
An enlargeable map of the United States after the Adams–Onís Treaty took effect on February 22, 1821.
An enlargeable map of the United States after Missouri was admitted to the Union on August 10, 1821.
Territorial claims of the Republic of Texas , May 2, 1836.
An enlargeable map of the United States after Texas was admitted to the Union on December 29, 1845.
An enlargeable map of the United States after the Oregon Treaty took effect July 17, 1846
An enlargeable map of the United States after the Treaty of Guadalupe Hidalgo was signed on February 2, 1848.
An enlargeable map of the United States after the creation of the Territory of Oregon on August 14, 1848.
An enlargeable map of the United States after the creation of the proposed State of Deseret on July 2, 1849.
An enlargeable map of the United States after the creation of the Territory of New Mexico and the Territory of Utah on September 9, 1850.
An enlargeable map of the United States after the creation of the Territory of Kansas and the Territory of Nebraska on May 30, 1854.
An enlargeable map of the United States after the admission of Oregon to the Union on February 14, 1859.
An enlargeable map of the United States after the creation of the proposed Territory of Jefferson on October 24, 1859.
An enlargeable map of the United States after the creation of the Territory of Dakota on March 2, 1861.
An enlargeable map of the United States after the creation of the Territory of Idaho on March 3, 1863.
An enlargeable map of the United States after the creation of the Territory of Montana on May 26, 1864.
An enlargeable map of the United States after the creation of the Territory of Wyoming on July 25, 1868.
An enlargeable map of the United States after the admission of Wyoming to the Union on July 10, 1890.
An enlargeable map of the United States as it has been since Hawaiʻi was admitted to the Union on August 21, 1959.