The records show registrations of British subjects residing in Tonga from 1874 until 1968.
The University of Auckland's Special Collections department received the records from the British High Commissioner to New Zealand, Jonathan Sinclair.
Special Collections manager Stephen Innes said the records were formerly held in the British Consulate in Nuku'alofa in Tonga.
Mr Innes said the Tongan registers would now be part of the Western Pacific Archives that began the university since 2002.
