The National Information Standards Organization (NISO) is a US-American non-profit standards organization. It was founded in 1939. In the meantime, NISO members consists of more than 70 organizations in the fields of publishing, libraries, IT and media.

NISO is accredited by the American organization for standardization (American National Standards Institute - ANSI); which releases standards as well.

Furthermore, the interests of NISO are represented in International Organization for Standardization's Technical Committee 46.

The goal of the NISO is to develop and maintain standards for management, retrieval, reuse, storage, metadata, and preservation of information including in the digital environment of information services, libraries and publishing. The usage of the NISO standard makes the creation, management, and effective interchange of information easier and can be used in research and development of applications.