Student Affairs in Higher Education: Theses/dissertations

With over two million online theses and dissertations indexed, "OATD.org aims to be the best possible resource for finding open access graduate theses and dissertations published around the world. Metadata (information about the theses) comes from over 1000 colleges, universities, and research institutions.

ERIC is the research database and information system for the field of education. It is produced by the Educational Resources Information Center. Established in 1966, ERIC is supported by the U.S. Department of Education's Office of Educational Research and Improvement and is administered by the National Library of Education (NLE).
Although ERIC does not hold actual copies of theses and dissertations, it holds a wealth of information about theses and dissertations when these words are entered as search terms.

WorldCat is OCLC’s union catalog of books, web resources, and other materials held in libraries worldwide. The database includes all the records cataloged by OCLC member libraries across North America, offers millions of bibliographic records, and includes records representing 400 languages. It is the Amazon.com of the library world.
This database shows libraries' holdings for dissertations and theses that may be borrowed through Interlibrary Loan