We "once" had one here in central TX, Mission Valley Cotton Mill in New Braunfels. I have relatives who worked there, as did one uncle when he was just a young soldier home from WWII. I had many a school dresses that my mother made for me from fabric that came from there due to her brother working there. Not exactly sure what year they closed but I have an aunt in her mid 90's that retired from this mill.
In the meantime, the building which covered 5 lots is being developed into a complex of businesses and renamed "Rivermill Texas. "
http://www.rivermilltexas.com/index.html