Library and Information Science

This is the umbrella organization for all American libraries.

"The Association of College & Research Libraries (ACRL) is the higher education association for librarians. Representing more than 11,000 academic and research librarians and interested individuals, ACRL develops programs, products and services to help academic and research librarians learn, innovate and lead within the academic community. Founded in 1940, ACRL is committed to advancing learning and transforming scholarship."

This is an independent California chapter of the Association of College and Research Libraries (ACRL).

A comprehensive list of library organizations.

This is the main professional organization for those working in public libraries.

The National Association to Promote Library & Information Services to Latinos and the Spanish Speaking

Information professionals in the Sacramento Valley, NE California and NW Nevada.
This is the most active local library organization chapter.