The city of Philadelphia is the largest city in Pennsylvania and the sixth most populous city in the United States. It is conterminous with Philadelphia County, and serves as the county seat. It is colloquially referred to as 'the City of Brotherly Love'. The city is commonly and informally referred to as 'Philly'. Philadelphia apartments for rent comparison page shows most up to date rent information on Philadelphia apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.