From the American Library Association:
"The American Library Association (ALA) accredits master’s programs in library and information studies across the United States, Canada, and Puerto Rico. There are 63 ALA-accredited master's programs and three programs seeking initial accreditation."
The majority of librarian positions require a minimum of a Master's in Library and Information Studies from an ALA-accredited program.
San José State University
University of California, Los Angeles
University of North Texas
University of Southern California (pending ALA-accreditation)