Pennsylvania Population Projections
New population projections by county are now available from the Pennsylvania State Data Center. According to the research brief detailing these projections, the commonwealth's "population will continue to grow, becoming larger, older and more diverse by 2030. The total population of Pennsylvania is projected to increase by the year 2030 to 13,190,400, representing a 7.4 percent increase from 2000." Butler County, because of it's proximity to Pittsburgh, is expected to grow significantly. Mercer County, though, is projected to experience little population change.