Le comté est fondé le , à partir de terres rattachées aux comtés de Coryell, de Bosque et de Parker[1]. Il est définitivement organisé et autonome, le [1].
(en) Palo Pinto County Historical Commission, History of Palo Pinto County, Texas : Word of Mouth Family History, Palo Pinto County, Texas, Palo Pinto County Historical Commission, , 304 p..
(en) Bobbie Watson Ross, Taylor & Bevers : Pioneer Families of Palo Pinto County, Texas, Bobbie Watson Ross, , 252 p..
(en) Carroll H. Wegemann, A Reconnaissance in Palo Pinto County, Texas : With Special Reference to Oil and Gas, U.S. Government Printing Office, , 9 p..
(en) Frederick Byron Plummer et Joseph Hornberger (Jr.), Geology of Palo Pinto County, Texas, vol. 13, The University, , 240 p..
(en) A. C. Lowther, Joe D. Moore et William J. Guckian, Soil Survey of Palo Pinto County, Texas, vol. 121 à 123, U.S. Department of Agriculture, Soil Conservation Service, , 150 p..