Limestone County is a county located in the state of Texas. Groesbeck is the county seat of Limestone County. The county was originally formed in 1846 and was organized in just a few months afterward. Springfield became the county seat but it was changed to Groesbeck in 1873. The last Indians that were roaming the area of what is now Limestone County were Apache, Kiowa, and Comanche Indians. Some of the top sights and tourist attractions located in Limestone County are Fort Parker State Park, Confederate Reunion Grounds State Historic Site, and Old Fort Parker Historic Site.