The Transcultural Mental Health Centre established its own library collection in 1999. In 2003, the Transcultural Mental Health Centre became part of the Diversity Health Institute, and the role of the Library broadened to support the research, clinical and educational activities of all the units of the DHI.

The Diversity Health Institute Library collection is located in two partner hospital libraries. The mental health material remains in the Mental Health Library at Cumberland Hospital, while a new multicultural health collection is under development at the Auburn Hospital Library.

All resources held in the Library are on the online catalogue available through the above catalogue link. This catalogue is shared with other Libraries in the former Western Sydney Area Health Service and Children's Hospital at Westmead, so not all items on the catalogue are necessarily located within the Diversity Health Institute or Transcultural Mental Health Centre collections.

Membership of the Library is free to staff of the DHI and Sydney West Area Health Service. The Library also participates in resource-sharing with other Australian Libraries, so other individuals, students and organisations are encouraged to approach their own Library or public library to access the DHI collection via interlibrary loan.

People intending to visit the DHI Library collections personally are encouraged to make an appointment with the DHI Librarian to ensure that the Library will be staffed.