| Official Name: | Greater Toronto and Hamilton Area |
| Nickname: | GTHA |
| Settlement Type: | Conurbation |
| Image Map1: | File:GTHA map.png |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Area Total Km2: | 8244.42 |
| Population As Of: | 2021 |
| Population Note: | Combined population of the cities of Toronto and Hamilton and the regional municipalities of Halton, Peel, York, and Durham |
| Population Total: | 7,281,694 |
| Population Density Km2: | 844 |
| Population Density Sq Mi: | 2216 |
| Demographics Type2: | GDP |
| Demographics2 Title1: | Total |
| Demographics2 Info1: | CA$514.832 billion US$410.733 billion (2021)[1] |
| Timezone: | EST |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Postal Code Type: | Postal Code |
| Postal Code: | L, M |
| Area Code: | 226, 519, 548, 416, 437, 647, 249, 705, 905, 289, 365 |
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.[2] 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 (which contains Oshawa). The GTHA forms the core of a larger urban agglomeration known as the Golden Horseshoe.
Beginning in the late-2000s, the term "Greater Toronto and Hamilton Area" was introduced by a few public bodies to refer to the GTA and the city of Hamilton as a single entity. The population of the combined area is 7,281,694 as of 2021,[3] and is projected to grow to 8.6 million by 2031.[4] The main series of roadways that connects all the areas together (going from Durham to Hamilton) includes highways 401, 427, 403, and the Queen Elizabeth Way. The GTHA has regional public transport served by GO Transit and local service by multiple agencies, which mostly use the Presto card as fare payment.
| Census division | Population (2016) | Population (2021) | Change |
|---|---|---|---|
| Toronto | |||
| Hamilton | |||
| Halton | |||
| Peel | |||
| York | |||
| Durham | |||
| Greater Toronto and Hamilton Area |