Territorial evolution of Montana
The following chronology traces the territorial evolution of the U.S. State of Montana.
Timeline
- Historical territorial claims of the United Kingdom in the present State of Montana:
- *Rupert's Land, 1670–1870
- **Anglo-American Convention of 1818
- Historical territorial claims of France in the present State of Montana:
- *Louisiane, 1682–1764
- **Treaty of Fontainebleau of 1762
- Historical territorial claims of Spain in the present State of Montana:
- *Luisiana, 1764–1803
- **Third Treaty of San Ildefonso of 1800
- Historical territorial claims of France in the present State of Montana:
- *Louisiane, 1803
- **Vente de la Louisiane of 1803
- Historical international territory in the present State of Montana:
- *Oregon Country, 1818–1846
- **Provisional Government of Oregon, 1843–1849
- **Oregon Treaty of 1846
- Historical political divisions of the United States in the present State of Montana:
- *Unorganized territory created by the Louisiana Purchase, 1803–1804
- *District of Louisiana, 1804–1805
- *Territory of Louisiana, 1805–1812
- *Territory of Missouri, 1812–1821
- *Unorganized territory previously the northwestern portion of the Missouri Territory, 1821–1854
- *Unorganized territory created by the Oregon Treaty, 1846–1848
- *Territory of Oregon, 1848–1859
- *Territory of Nebraska, 1854–1867
- *Territory of Washington, 1853–1889
- *Territory of Dakota, 1861–1889
- *Territory of Idaho, 1863–1890
- *Territory of Montana, 1864-1889
- *State of Montana since November 8, 1889