| Jack County Texas Cities/Towns - Bryson, Jacksboro (County Seat), Jermyn, Perrin |
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![]() Your Ad Here Jack County is a county located in the U.S. state of Texas. In 2000, its population was 8,763. Its county seat is Jacksboro. History Jack County is named for Patrick Churchill Jack, and his brother William Houston Jack, both soldiers of the Texas Revolution. ![]() |