Statehood of the Great Plains and Mountain States (1861–1912)

1. Dakota Territory created by Congress

   Mar 2, 1861Labels: Dakota Territory, U S

   • SHSND Archives
   • Dakota Territory

2. Idaho Territory organized from western lands

   Mar 3, 1863Labels: Idaho Territory, U S

   • Idaho Territory
   • Dakota Territory

3. Montana Territory created from Idaho Territory

   May 26, 1864Labels: Montana Territory, Idaho Territory

   • US Senate MT
   • Montana Territory

4. Nevada admitted as 36th state

   Oct 31, 1864Labels: Nevada, Abraham Lincoln

   • Presidency Project
   • Nevada Day

5. Nebraska admitted as 37th state

   Mar 1, 1867Labels: Nebraska, Andrew Johnson

   • Presidency Project

6. Wyoming Territory created by Organic Act

   Jul 25, 1868Labels: Wyoming Territory, Organic Act

   • US Senate WY
   • Wyoming History

7. Colorado admitted as 38th state

   Aug 1, 1876Labels: Colorado, Centennial State

   • Library of Congress
   • CO Attorney General

8. Enabling Act authorizes four new states

   Feb 22, 1889Labels: Enabling Act, U S

   • Enabling Act
   • UMT ScholarWorks

9. North Dakota admitted to the Union

   Nov 2, 1889Labels: North Dakota, Benjamin Harrison

   • North Dakota
   • Enabling Act

10. South Dakota admitted to the Union

    Nov 2, 1889Labels: South Dakota, Benjamin Harrison

    • Enabling Act
    • Wikisource SD

11. Montana admitted as 41st state

    Nov 8, 1889Labels: Montana, Benjamin Harrison

    • US Senate MT
    • Montana Territory

12. Washington admitted as 42nd state

    Nov 11, 1889Labels: Washington, Benjamin Harrison

    • WA Legislature
    • WA Secretary State

13. Idaho admitted as 43rd state

    Jul 3, 1890Labels: Idaho, U S

    • Idaho Hist Soc
    • US States List

14. Wyoming admitted as 44th state

    Jul 10, 1890Labels: Wyoming, Benjamin Harrison

    • US Senate WY
    • WyoHistory org

15. Utah admitted as 45th state

    Jan 4, 1896Labels: Utah, Grover Cleveland

    • Utah Archives
    • Congress gov

16. Oklahoma admitted as 46th state

    Nov 16, 1907Labels: Oklahoma, Theodore Roosevelt

    • National Archives
    • Oklahoma Enabling

17. New Mexico admitted as 47th state

    Jan 6, 1912Labels: New Mexico, U S

    • National Archives

18. Arizona admitted as 48th state

    Feb 14, 1912Labels: Arizona, William Taft

    • Presidency Project
    • National Archives