About the Law Library

Welcome to the Arthur W. Diamond Law Library at Columbia Law School.

The second-largest academic law library in the country, the Diamond Law Library features more than 400,000 titles, 1 million paper volumes, and 275,000 microform volume-equivalents. Users also have access to a wealth of online information from sources the Law Library maintains and the myriad of materials offered through Columbia University’s libraries.

Librarians are here to guide you through the collections. Please observe the few rules we have, and share with us any suggestions you have for making the Diamond Law Library a more effective place for legal research and study.


Law Library and Reference Office hours vary during holidays and exams and between academic semesters. Consult our live calendars for the most up-to-date information.

Law Library and Circulation Desk
Reference Desk

All Law Library services end 10 minutes before closing, including the Circulation Desk and scanners.



Columbia Law School (Morningside Heights campus)
Jerome L. Greene Hall, 3rd floor
Amsterdam Avenue and West 116th Street

Take the stairs or the elevator up to the third floor. The entrance to the Law Library is located in the northwest corner of the main corridor.

Directions to the Morningside Heights Campus

Columbia Law School is easily accessible via public transportation and car. 

For detailed driving directions, see Columbia's Morningside Heights visitor information before your campus visit.

About Arthur W. Diamond

Arthur W. Diamond ’26, who served as a captain in the United States Army Corps of Engineers during World War II, was a real estate developer and benefactor to many organizations. He worked with his brothers, Harold and Sidney ’22, to expand their family’s real estate business, which included apartment houses and shopping centers in Manhattan, Queens, and the Bronx. 

Before his death in 1996, Mr. Diamond was involved with many charities. He donated funds to rehabilitate the Angel of the Waters statue in Central Park’s Bethesda Fountain and gave significant gifts to Lenox Hill Hospital and New York Hospital. He and Sidney provided funds through the Diamond Brothers Foundation to establish the Diamond Classroom, located on the eighth floor of Columbia Law School.

A gift of $7 million has been made to Columbia Law School by Miriam and Arthur W. Diamond Charitable Trust, which Jack Adelman and Jay H. McDowell serve as trustees.