Population of Pleasants County Last official estimated population of Pleasants County was 7,577 (year 2014) [1]. This was 0.002% of total US population and 0.4% of total West Virginia state population. Area of Pleasants County is 134.5 miÂ² (=348.5 kmÂ²), in this year population density was 56.31 p/miÂ². If population growth rate would be same as in period 2010-2014 (-0.09%/yr), Pleasants County population in 2018 would be 7,549 .