Johnston finds its place in south-central Oklahoma which it acquired since prior to statehood - 16th November 1907 - when Tishomingo becomes befouled shortly afterwards with many other small towns included like Coleman, Rogen and Ravia spread out accross its 3 300 km² (1272 sq mi). According to number taken by the United States Census Bureau estimates; a sum total people occupying Johnston come 2019 put at 10 818 individuals; making Johnston one of more densely populated counties operating along sideOklahoma's border.