Old Forge is located in northern Herkimer County at , in the southern part of the town of Webb. The community lies within the Adirondack Mountains, a southern extension of the Canadian Shield and an important geologic feature of New York. As with any settlement in Adirondack Park, development both inside and outside the hamlet of Old Forge is somewhat restricted, and land use policies set forth by the Adirondack Park Agency must be observed.