Lancaster Public Library Lancaster Public Library is the Central Resource Library and District Center Library for Lancaster County. It serves all citizens of Lancaster County. This central location also serves as the headquarters of the Lancaster Public Library. Hours of Operation Monday: 10:00 AM - 6:00 PMTuesday: 10:00 AM - 6:00 PMWednesday: 10:00 AM - 6:00 PMThursday: 10:00 AM - 6:00 PMFriday: 9:00 AM - 4:00 PMSaturday: 9:00 AM - 2:00 PMSunday: Closed Library Information Address: 125 N. Duke Street Lancaster, PA 17602 Phone number 717.394.2651 Visit Website Email address lholland@lancasterpubliclibrary.org