The UP Integrated School has three (3) libraries, one for each of the buildings: the K-2 Library, the 3-6 Library, and 7-12 Library.

The UPIS Libraries house a growing collection of 44,000 volumes of books and other materials such as pamphlets, periodicals, clippings, maps, videos and audio tapes, and CDs/DVDs. It is open from 8:00 AM- 12:00 PM and 1:00- 5:00 PM on weekdays except holidays. The Library operates mainly on an open-shelf system in which borrowers have free and direct access to books; and a closed-shelf system for periodicals and resource materials limited to room/overnight use only. 

As of September 2022, on-site services are back following the guidelines for the new normal.