There are 30 public libraries in Delaware County, Pennsylvania. The Delaware County Libraries is a federation of 26 library organizations, with 28 branches. The law library in the county courthouse is not a member of the county system, but its holdings are listed in the system catalog. The Upper Chichester Library is located in the county but not part of the system. The county system serves 550,000 residents with a collection of 1,400,000 volumes. 2,150,000 items circulate per year.
