Greymouth is located in the West Coast region of New Zealand's South Island. It serves as the largest town within this region and functions as the seat of the Grey District Council.
The Greymouth urban area has an estimated population of 8,610, while the broader Grey District contains approximately 14,600 residents, accounting for 42% of the West Coast's total population. A significant portion of the district—roughly 65%—is part of the Conservation Estate managed by the Department of Conservation. This extensive land area establishes Greymouth as a primary center for walkers and trampers.