The Greater Cities Commission (formerly the Greater Sydney Commission) was an independent agency of the New South Wales Government responsible for land use planning across the Six Cities Region in New South Wales, Australia. The agency was brought into effect through the Greater Cities Commission Act 2022 which stipulated the composition of the agency and its responsibilities. The Greater Cities Commission was created for Greater Sydney, Central Coast, Newcastle and Wollongong. The objectives of the commission were to act on housing supply issues (including a diversity of housing types), to promote sustainable and environmentally-friendly development, to support housing that fosters productivity liveability and environmental quality, to provide First Nations people with opportunities in their local area, to promote economic activity, and to act on other issues surrounding land use.