population of johnston county ok
Population of Johnston County. Last official estimated population of Johnston County was 10,996 (year 2014) [1]. This was 0.003% of total US population and 0.3% of total Oklahoma state population. Area of Johnston County is 658.2 miÂ² (=1704.8 kmÂ²), in this year population density was 16.71 p/miÂ². If population growth rate would be same as in period 2010-2014 (+0.09%/yr), Johnston County population in 2018 would be 11,035 .