With more than 2.6 million volumes and over 38,000 current periodicals and serials, it is the 44th largest library in the U.S. Its on-line catalog provides access to other local and national indexes, specialized databases and library catalogs throughout the nation. The interlibrary loan service makes available research material from other institutions, nationally and internationally. Hamilton Library also houses a variety of Special Research Collections unique to Hawai‘i and the Pacific.
In addition, Honolulu has rich archival resources, including the Hawai‘i State Archives, Bishop Museum Library and Archives, Mission Houses Museum Library, State of Hawai‘i Bureau of Conveyances, and many more.
The Historic Preservation Program maintains its own collection of preservation resource material, including books, serials and periodicals, student research papers, films, video and audio tapes, and material from preservation-related programs, government offices, non-profit and community organizations, both domestic and international. The material is available for reference use and short term loan.