1877 Arapaho are moved to Shoshone (Wind River) Reservation for temporary quarters (have remained there ever since).

1879 Lotteries and games of chance are outlawed by legislation.

1880 Population, 20,789. Cheyenne Club built by wealthy cattlemen.

1883 Cheyenne completes incandescent lighting system.

1884 Fremont County is organized.

1885 Chinese massacre in Rock Springs.

1886 Governor Warren approves act providing for capitol building. Commission is appointed to build capitol and state university. Legislature provides for construction of Institution for Deaf, Dumb and Blind at Cheyenne. First county library established in Cheyenne. First county fair - Johnson County. Severe winter kills thousands of cattle. Fremont and Elkhorn Valley Railroad builds branch to Douglas called Wyoming and Central.

1887 Cornerstone of capitol building is laid at Cheyenne.

1888 September 6: University of Wyoming opens at Laramie. Crook and Pease (Johnson) Counties are organized. 400 Mormon families move into Big Horn Basin. Wyoming National Guard is established. Legislature appropriates funds for penitentiary at Rawlins. Converse, Natrona, and Sheridan Counties are created.

1889 November: Wyoming adopts state constitution.

1890 Population, 62,553. July 10: Wyoming is admitted into Union as the 44th state. October 14: Francis E. Warren (last territorial governor) is inaugurated as governor of state. First Wyoming congressmen are elected: Joseph M. Carey (last delegate) and Francis E. Warren, U. S. senators; Clarence D. Clark, representative-at-large. Big Horn and Weston Counties are created. First oil well is brought in by Pennsylvania Oil & Gas Company in the Shannon field of the Salt Creek district.

1891 President Harrison establishes Yellowstone Timber Land Reserve, first in the U.S.

1892 Johnson County Cattle War.

1895  Oil refinery is built at Casper. Dupont Powder Company begins development of soda deposits in Wyoming.

1896  Hot Springs is purchased from Shoshone Indians.

1897  First Cheyenne Frontier Day is celebrated.

1898  New penitentiary is completed at Rawlins. Legislature enacts law taxing migratory stock from adjoining states.

1899  U.P. mail train is robbed of $60,000 in unsigned bank notes at Wilcox.

1900 Population, 92,531. Chief Washakie buried will full military honors in post cemetery at Fort Washakie.