Skip to Main Content

Guide to Columbia Law Library Services and Policies

Law Library News

Law School Study and Exam Period

The Law Library will be open 24 hours a day to Columbia Law School affiliates only from 8am Thursday, May 25- 6pm Friday, May 10.

CU affiliates and others who need to use particular Law Library resources or consult with a reference librarian should pre-arrange a visit at least the day before by emailing so they can be added to the Law Library Approved Access List. 

Services Beginning May 11

Due to the renovation, the Law Library in Jerome Greene Hall will be closed to patrons beginning Saturday, May 11.

Dedicated study space for Columbia Law School students as well as circulation desk and reference services will open in the lobby of William and June Warren Hall (Big Warren) on Tuesday, May 28.

In the interim period, Columbia patrons seeking access to Law Library materials may request them via Pegasus or by emailing, and arrangements will be made for pick up. Reference services will be available via email Monday-Friday 10am-6pm.

Access to the Law Library During Study and Exam Period

During the Law School study and exam period, from April 25-May 10, access to the Law Library is limited to current Columbia Law School affiliates.

For Columbia Law School Affiliates: Just tap your CUID at the turnstile to enter the Law Library. 
If for any reason your ID does not grant access through the turnstile, entry to the library will not be permitted. You must contact the University ID Center

If you are in possession of a Law Library Spring Semester Pass, it will continue to work during this period. 

Other interested visitors (including CU students, faculty, staff, alumni, and those with LIO passes) who need to meet with a reference librarian or use a particular Law Library item or database must email at least the day before to pre-arrange a visit.


Course Reserves

Casebooks and other required texts may be placed on Course Reserves at the request of the instructor. If a required text for your class is not on Course Reserves, ask your professor to fill out the Google Form emailed by the Law Library. 

Course Reserves may be available electronically, in print, or both.

Print Course Reserves are located behind the Circulation Desk in the Law Library.  You may borrow a Course Reserve book and use it within the Law Library. They are not permitted to leave the Law Library.

Finding Books in the Law Library

Use our Law Library catalog, Pegasus, to search for a book, journal, or electronic resource by title, author, or keyword. Use post-search filters to narrow your list of results. Advanced search with more functionality is available.

Once you have found a particular book or item, click to see its catalog record. On the record page, make note of the LocationCall Number, and Availability.  "On shelf" means a book is available for you to retrieve. Books may be housed on the 4th Floor, in the 3rd Floor Core Collection Reading Room, in the Cellar, or in an offsite storage facility. Click the "MapIt" hyperlink to see where the book is located in the library. If a book is stored in an offsite facility, email the Reference Desk to request retrieval. If a book is not available, consult a reference librarian to discuss other options, like electronic availability or InterLibrary Loan.

Using Law Library Databases

Westlaw, Lexis+, and Bloomberg Law all use individual usernames and passwords for access. 1Ls and LL.M.s receive instructions for how to set up their accounts at the time of orientation or during the first week of classes. Transfer students or students who need assistance may email

You may access other Law Library databases from the Law Library's Databases and Indexes A-Z webpage or by searching Pegasus for the name of the database. In most cases you will be prompted to log in with your UNI and password for access.

For assistance using or locating material in one of the Law Library databases, you may contact a reference librarian.

Other Columbia University Libraries

Law students are welcome to both study in and use the materials of the other libraries on campus. CLIO, the Columbia University Libraries' catalog, allows you to search for physical materials as well as by article title for articles contained in many of the various databases CUL subscribes to.

For information on the various services provided by the other libraries on campus, how to obtain materials from them, and much more, visit the Columbia University Libraries News webpage.

Law Library reference librarians are available to assist law students with navigating CLIO and the Columbia University Libraries' collections and services, although we may refer you to other subject specialist librarians on campus where appropriate.