The ISEAS Library collection is categorised as follows:
The General Collection comprises books on Southeast Asia. Titles published after the 1950s will be available for loan.
The Reference Collection consists of various reference tools, including dictionaries, encyclopedias, directories, indexes, handbooks and guides.
Statistical works of Southeast Asian countries are major components of this collection classified according to countries.
The Documents Collection consists of pamphlet-type materials, articles and other items of less than a hundred pages. These are mainly "grey" or "fugitive" literature.
The Library subscribes to about 2,000 current serial titles, both in English and in the vernacular languages.
The Map Collection which comprises contemporary maps of Southeast Asia is located at the Reference Area. From time to time, an old or antiquarian map which has research value is acquired. Requests may be made at the Circulations Desk.
The Library subscribes to more than 36 titles of major Southeast Asian and international newspapers both in English and in the vernacular languages. Back issues of selected titles are kept permanently in microfilm for archival research. Requests may be made at the Circulation Desk.
The Microform Collection includes published and unpublished materials, including back issues of selected newspapers, journals, theses, rare books and retrospective newspaper clippings files. Requests may be made at the Circulation Desk.
Library Office Collection
The Library Office (LO) Collection consists of unpublished dissertations and other semi-restricted publications. Requests may be made at the Circulation Desk.