Mary and John Gray Library, University library at Lamar University in Beaumont, United States

Mary and John Gray Library is the university library for Lamar University and Lamar Institute of Technology in Beaumont, Texas. Four floors shelve books and periodicals arranged in the Library of Congress Classification. The building has 17 study rooms, a first-floor Starbucks and an open-access computer lab with 120 computers on the seventh floor. As of July 2026 it is closed for renovations.

The library opened on April 26, 1976, following a dedication ceremony with state officials present. It was built as part of Lamar University's campus development to serve the academic needs of students and faculty.

The library's three named rooms are the Lamar Room, honouring former Texas president Mirabeau B. Lamar; the Spindletop Room, recalling the 1901 oil discovery at Spindletop near Beaumont; and the Plummer Room, named for former head librarian Julia Plummer. The rooms sit on the seventh floor, which also holds an open-access computer lab with 120 computers and classrooms.

The facility can accommodate around 850 students and offers study rooms, computer workstations, and service desks throughout the building. Visitors should expect busier periods during typical class times and may want to arrive early for preferred study spots.

The library is a Federal Depository Library, giving the public free access to U.S. government publications. Its three event rooms carry local names: the Lamar Room for Mirabeau B. Lamar, the Spindletop Room for the 1901 Beaumont oil discovery, and the Plummer Room for former head librarian Julia Plummer.