The Governor's Study, originally intended to be a private library. The actual Governor's study was to be the room now known as the Council Room. It is not clear if this division of functions was adhered to in the 19th century. However during the three decades of Commonwealth presence, the Council Room was used for Executive Council meetings, and this room became the Governor-General's study. The room obtained its present character during the Commonwealth period.

The room is notable for the design and integration of its joinery. On the large cedar and mahogany Partners desk is a cedar stationery box. Custom-made bookcases, with ten double door panels of cedar and mahogany, line the room. These contain works on the constitutional aspects of the Governor's position, plus his own private collection. The chairs and curtain rods are also made of cedar. The mantelpiece is of Belgian red marble, with a cedar-framed overmantel mirror which matches the bookcases. The mantelpiece has a polished steel and brass fender, fire irons and a slate hearth. A six branch brass fitting provides the lighting.

In his study the Governor receives visitors and works on papers connected with his position. The room is located on the lower right of the Northern Facade, and looks out on to the formal garden.