what is the population of the state of pennsylvania?
Population of Pennsylvania state. Last official estimated population of Pennsylvania was 12,802,503 (year 2015)[1]. This was 4% of total US population. Area of Pennsylvania is 46,054.4 miÂ² (=119280.3 kmÂ²), in this year population density was 277.99 p/miÂ². If population growth rate would be same as in period 2010-2015 (+0.16%/yr), Pennsylvania population in 2017 would be 12,842,773*.