September 27

1867 On Friday evening, September 27, 1867, the "citizens of Cheyenne and surrounding country met in Mass Convention at the City Hall" to discuss and support a resolution for the organization of the County of Laramie. Laramie County had been created and the boundaries defined as "all that portion of the Territory of Dakota west of the one hundred and fourth meridian west" by the Sixth Dakota Legislative Assembly on January 9, 1867.

1886 The cornerstone was laid for the first building at University of Wyoming. It is now known as Old Main.

1909 The Carnegie Library in Basin was dedicated on September 27, 1909.

1923 Lockett was a station on the Chicago, Burlington and Quincy Railroad. On September 27, 1923, it was the scene of a major railroad disaster. Read more about the disaster here.