United College Wu Chung Library (聯合書院胡忠圖書館; noted as UCL) is the library of the United College of the Chinese University of Hong Kong (CUHK).

As one of the seven libraries in CUHK and named after Wu Chung, the United College Library houses the Philosophy collection, major Chinese monograph series collection and General Education collection, and provides facilities including 24-Hour study facilities, Group Study Rooms and Outdoor Reading Area.

The United College Library was first founded in 1956 and located at Caine Road, Hong Kong.

The redesigned library applies the frameless transparent window walls, which located on the lower ground floor and the ground floor, to merge the indoor and outdoor for users to enjoy the waterfall and greenery.

On the first floor, it offers the Outdoor Reading Area, the Seminar Room and the Independent Learning Centre.