The Hewitson Library includes a number of special collections:

Theological Collection
Current material supports the teaching programmes of the Knox Centre for Ministry and Leadership and the life of the Presbyterian Church.

Presbyterian Collection
This reference collection strives to be the definitive holding of all publications published by, or about, the Presbyterian Church in Aotearoa New Zealand.

The Rita Mayne England Collection
A Growing Resource for the Study of Asian Religions, Cultures and Theologies.

Chrysalis Seed Collection
An Art and Faith Collection gifted by the Chrysalis Seed Trust
To equip artists to integrate art and faith, and reconcile art and faith communities

New Zealand & Pacific Collections
Consisting of New Zealand and Pacific historical and ethnographic material, this collection originates from a deposit by Te Aka Puaho (the Maori Synod).

A. S. Paterson Collection
This is a multi-disciplinary collection, primarily for the general reading and research needs of Knox College residents.

Kids Friendly Collection
A new Library collection that has been established to support the work of the PCANZ Kids Friendly Team.

Youth Ministry Collection
A collection supporting the work of Youth Ministry.

Rare Books Collection
The collection contains a number of significant pre-1800 publications. Many of these books originated from the personal collections of former Theological Hall lecturers.