Reading is a city in southeastern Pennsylvania, USA, and seat of Berks County. Reading is the principal city of the Greater Reading Area and had a population of 88,082 as of the 2010 census, making it the fifth most populated city in the state, after Philadelphia, Pittsburgh, Allentown and Erie, and the sixth most-populous municipality. According to the 2010 census, Reading has the highest share of citizens living in poverty in the nation.