The NLL cooperates with many libraries, organisations and institutions in Europe and in the world with the aim of sharing professional experience and knowledge.

The NLL has concluded cooperation contracts with the National Libraries of Estonia, Lithuania, the Czech Republic, Poland, Slovakia, Sweden, Belarus, Karelia, Russia and Ukraine, with the Russian State Library and All-Russia State Library of Foreign Literature.

Agreements on cooperation have been concluded with the National Library of Azerbaijan, the National Parliament Library of Georgia and the Association of Georgian Librarians.

The international activities of the NLL are focused upon:

• participation in international library organisations IFLA, CENL, CDNL, CERL, EBLIDA, ELAG, LIBER, IAML, IBBY, Bibliotheca Baltica, etc.

• participation in international organizations UNESCO, ISO, IASA, ICON, IGELU, IPC and agencies ISBN, ISSN and ISMN

• implementation of joint international projects and programs, for example, EDLnet, TELplus, EDLocal, publication of the facsimile album “Terra Mariana 1088 - 1888”

• cooperation with international organisations, foreign embassies in Latvia and Latvia’s embassies abroad, information and culture centres to promote Latvia’s culture heritage and organise international exhibitions and conferences

• international document exchange and participation at international book fairs.