Dauphin County, Pennsylvania (PA) County population in 2014: 271,453 (87% urban, 13% rural); it was 251,798 in 2000. County owner-occupied with a mortgage or a loan houses and condos in 2010: 49,790. County owner-occupied free and clear houses and condos in 2010: 21,701. County owner-occupied houses and condos in 2000: 67,116.