Cherry trees in bloom in front of Jerome Greene Hall

Arthur W. Diamond Law Library

One of the finest collections of legal materials in the nation—at your service.

For information about hours, access, databases and e-resources, fines, reference services, and any other information for the duration of the pandemic, please see our COVID-19 Reference Guide.

Fee-Based Clients: The Fee-Based Services department will continue to operate, with reduced capabilities.


The Arthur W. Diamond Law Library, named after Arthur W. Diamond (Class of 1926), located in Jerome Greene Hall, is home to one of the most comprehensive print and digital legal collections in the country. In addition to a comprehensive U.S. law collection, it also has strong collections in international, foreign, and comparative law and a special section devoted to Japanese law.

Print Collection

  • 440,000+ titles from 184 countries in 149 languages
  • Largest collection of Japanese law materials at a U.S. university
  • 200,000+ titles covering foreign and comparative law
  • 60,000+ titles covering public and private international law
  • 550,000+ volumes located offsite and accessible in 24 hours
  • 30,000 volumes and 1,500 linear feet of papers and manuscripts in Special Collections
  • Students can browse almost all the books located onsite, both in the Law Library and in other Columbia University Libraries.Students can browse almost all the books located onsite, both in the Law Library and in other Columbia University Libraries.
     

Electronic Collection

  • 100,000+ titles, covering U.S., foreign, and international law
  • Extensive collection of legal electronic databases (U.S., foreign, and international)
  • Access to the entire Columbia University database collection

Reference Librarians

All Reference Librarians have law degrees and graduate library science degrees and are available seven days a week for help with:

  • Legal research
  • Research planning
  • Source gathering
  • Online databases
  • Internet searches
  • Interlibrary loans from institutions across the world