In the reference area on the 2nd floor of the Library Building there are handbooks and reference material on a variety of subjects: General encyclopaedias, dictionaries, Parliamentary Records (Alþingistíðindi) Official Government Gazette (Stjórnartíðindi), lawbooks and court reports, such as the Icelandic Law Code and Supreme Court Rulings (Hæstaréttardómar), books of maps, bibliographies and reference books on several specialities, to name a few.
On the third and fourth floors there are also the most common dictionaries and more reference books for use there. In the Audio-visual Department on the fourth floor there is a good collection of reference works on music. In the reading room on the first floor there are reference books related to subjects of the Manuscript Department and the Icelandic National Collection. In the Law Library there are reference works in the field of law.