There are 5 municipalities in the library’s direct service area:

• Borough of Mechanicsburg (pop. 9,311)
• Borough of Shiremanstown (pop. 1,634)
• Monroe Township (pop. 6,230)
• Silver Spring Township (pop. 19,557)
• Upper Allen Township (pop. 23,183)

Total Service Area Population (2020 census): 59,915