Banner is an unincorporated community in southern Sheridan County, Wyoming, United States.

[1] Although Banner is unincorporated, it had a post office, with the ZIP code of 82832, which closed in 2004.

[3] Public education in the community of Banner is provided by Sheridan County School District #2.

Two important battles of the war between the United States and the Plains Indians happened nearby.

The 1866 Fetterman Fight was a victory of the Lakota, Cheyenne, and Arapaho Indians over soldiers of the United States army, and the 1867 Wagon Box Fight involved Lakota Sioux and soldiers from nearby Fort Phil Kearny.