[4] Both the county and its seat are named for Stephen Crosby, a land commissioner in Texas.

[5] That same day, voters in Denver City and Yoakum County also approved separate referendums to permit liquor sales.

[6] Part of the large Matador Ranch of West Texas extends into the county.

Archeological artifacts indicate hunter-gatherers hunted the mammoth, mastodon, saber-toothed cat, and giant ground sloth.

[8] In 1871, Ranald S. Mackenzie fought Quanah Parker and other Comanches at the Battle of Blanco Canyon.

The campaign established the Mackenzie Trail used by the first settlers in Crosby County in the late 1870s.

[9] The Texas Legislature formed Crosby County from Young and Bexar districts in 1876.

[10][11][12] Confederate veteran Paris Cox first visited the Caprock Escarpment of the Llano Estacado with a group of buffalo hunters in 1879.

[8] The country and western song (Ghost) Riders in the Sky was inspired by a legend of a stampede that took place in Crosby County, specifically Stampede Mesa, in 1889 reference https://texashillcountry.com/legend-ghost-riders/ based on a dispute between a cattle drive party and a nester.