The Greater Toronto and Hamilton Area (GTHA) is an urban conurbation that is composed of some of the largest cities and metropolitan areas by population in the Canadian province of Ontario. The GTHA consists of the Greater Toronto Area (GTA) and the City of Hamilton. Unlike the Golden Horseshoe, which covers a larger area, the GTHA specifically refers to the urban conurbation of these regions. Despite not being in the conurbation's name, it also includes the City of Oshawa and its sub-metropolitan area. The GTA is Canada's most populous metropolitan area that includes the core City of Toronto and the regional municipalities of Halton, Peel, York, and Durham. The GTHA forms the core of a larger urban agglomeration known as the Golden Horseshoe.