Collin County, Texas: History
Native Americans around Collin County and North Texas included the Caddo, Comanche, Cherokee, Delaware, Kickapoo, and Tonkawa. Several Native American sites have been found, including around Lavon Lake and Sister Grove Creek. Both the county and the county seat were named after Collin McKinney (1766–1861), one of the five men who drafted the Texas Declaration of Independence and the oldest of the 59 men who signed it.
Like many counties in North Texas, Collin County voted against secession from the United States. This is mainly due to the relatively weak hold of slavery in Collin County and the influence of James W. Throckmorton, who had represented Collin County in both the Texas Senate and the Texas House of Representatives. Nonetheless, Collin County sent men to fight for the Confederacy with Throckmorton leading his own company of mounted riflemen.