The Mission Houses Museum Library contains rare books, Manuscript Collections and other special collections. The general focus of the Library's collections is on the history of Hawai‘i from 1778 to 1900. The Library's Online Catalog provides access to its holdings, while its digital library displays searchable full-text images of original documents.

Today, the MHM Library collection contains over 12,000 printed volumes and over 300 linear feet of manuscript material, including:

• Correspondence of the New England Protestant missionaries living in Hawai‘i, including letters, journals and reports, personal as well as business, 1820 - 1880.

• Archives of the Hawaiian Evangelical Association, including individual church records and reports written by American protestant missionaries and Native Hawaiian pastors;

• Hawaiian-language books, including the earliest imprints in the language, 1822 - 1900;

• Micronesian and Marquesan language books and primary sources;

• Books on early voyages to Hawai‘i and the Pacific;

• Pictorial collections, including drawings, sketches, lithographs, photographs and copperplate engravings.

• Microfilm of missionary letters and journals