All Columbia dissertations are searchable by author and title through CLIO. If you are looking for a dissertation by subject or department, and don't find it in CLIO, please Ask A Librarian for assistance.
ProQuest Digital Dissertations Database provides the full text of nearly all Columbia dissertations completed since 1997 and the full text of some earlier dissertations. It can be searched by author, school, or keyword in the title or abstract.
Some Columbia dissertations are available on Columbia's Academic Commons website. To find dissertations, limit the "content type" to "dissertations."