Calgary is the largest city in the Province of Alberta, Canada. It is located in the south of the province, in an area of foothills and high plains, approximately 80 km (50 mi) east of the front ranges of the Canadian Rockies. The city is located in the Grassland region of Alberta. Calgary is the third largest civic municipality, by population in Canada.

In the Canada 2006 Census, the city had a population of 988,193 and the CMA had a population of 1,079,310. As of the 2009 civic census, Calgary's population was 1,065,455 and the CMA had a population of 1,182,446.[4] Greater Calgary is the fifth largest CMA in the country after Toronto, Montreal, Vancouver, and Ottawa.

Located 300 km (200 mi) due south of Edmonton, statisticians define the narrow populated area between these cities as the "Calgary-Edmonton Corridor." Calgary is the largest Canadian metropolitan area between Toronto and Vancouver.

Calgary is well-known as a destination for winter sports and ecotourism with a number of major mountain resorts near the city and metropolitan area. Economic activity in Calgary is mostly centred on the petroleum industry; however, agriculture, tourism, and high-tech industries also contribute to the city's economic growth. In 1988, Calgary became the first Canadian city to host the Olympic Winter Games.

Before the Calgary area was settled by Europeans, it was inhabited by Pre-Clovis people whose presence has been traced back at least 11,000 years.[6] In 1787, cartographer David Thompson spent the winter with a band of Peigan encamped along the Bow River. He was the first recorded European to visit the area, and John Glenn was the first documented European settler in the Calgary area, in 1873. The native way of life remained relatively unchanged until the late 1870s, when Europeans hunted the buffalo to near-extinction.

With the buffalo gone, the natives began trapping beaver and other fur-bearing mammals for the Hudson's Bay Company and North-West Company, who set up trading posts in the Bow Valley and at Rocky Mountain House to the northwest.

The site became a post of the North-West Mounted Police (now the RCMP). The NWMP detachment was assigned in 1875 to protect the western plains from U.S. whiskey traders, and to protect the fur trade. Originally named Fort Brisebois, after NWMP officer Éphrem-A. Brisebois, it was renamed Fort Calgary in 1876 by Colonel James Macleod. It was named after Calgary on the Isle of Mull, Scotland. While there is some disagreement on the naming of the town, the Museum on the Isle of Mull explains that kald and gart are similar Old Norse words, meaning 'cold' and 'garden', that were likely used when named by the Vikings who inhabited the Inner Hebrides. Alternatively, the name might come from the Gaelic, Cala ghearraidh, meaning 'beach of the meadow (pasture)'.

The Calgary Fire of 1886 occurred on Sunday, Nov. 7, 1886. 14 buildings were razed and losses estimated at $103,200. Nobody was killed or injured. To ensure this would never happen again, city officials drafted a law that all large downtown buildings were to be built with Paskapoo sandstone.

When the Canadian Pacific Railway reached the area in 1883 and a rail station was constructed, Calgary began to grow into an important commercial and agricultural centre. The Canadian Pacific Railway headquarters are located in Calgary today. The Calgary townsite had the good fortune to be built at the entrance to the Kicking-Horse Pass, one of the few passages through the sheer eastern wall of the Rocky Mountains. The 10,000-12,000 foot-high peaks denied access to a railway all along their thousand-mile length, except for a narrow valley which led from Calgary into the heart of British Columbia. This meant that the railroad had to be routed through Calgary, which became a major supply station during the construction process. Calgary was officially incorporated as a town in 1884 and elected its first mayor, George Murdoch. In 1894, it was incorporated as "The City of Calgary" in what was then the North-West Territories. After the arrival of the railway, the Dominion Government started leasing grazing land at minimal cost (up to 100,000 acres for one cent per acre per year). As a result of this policy, large ranching operations were established in the outlying country near Calgary. Already a transportation and distribution hub, Calgary quickly became the center of Canada's cattle marketing and meatpacking industries.

Between 1896 and 1914 settlers from all over the world poured into the area in response to the offer of free "homestead" land. Agriculture and ranching became key components of the local economy, shaping the future of Calgary for years to come. The world famous Calgary Stampede, still held annually in July, grew from a small agricultural show and rodeo started in 1912 by four wealthy ranchers to "the greatest outdoor show on earth".

With its inception in 1924, Banff National Park became an international tourist attraction, along with the Banff Springs Hotel, and Calgary became the staging point for people destined for the park.

Calgary is located at the transition zone between the Canadian Rockies foothills and the Canadian Prairies, and is relatively hilly as a result. Calgary's elevation is approximately 1,048 m (3,440 ft) above sea level downtown, and 1,083 m (3,550 ft) at the airport. The city proper covers a land area of 726.5 km2 (280.5 sq mi) (as of 2006) and as such exceeds the land area of the City of Toronto.

There are two major rivers that run through the city. The Bow River is the largest and flows from the west to the south. The Elbow River flows northwards from the south until it converges with the Bow River near downtown. Since the climate of the region is generally dry, dense vegetation occurs naturally only in the river valleys, on some north-facing slopes, and within Fish Creek Provincial Park.

The city is large in physical area, consisting of an inner city surrounded by various communities of decreasing density. Unlike most cities with a sizable metropolitan area, most of Calgary's suburbs are incorporated into the city proper, with the notable exceptions of the city of Airdrie to the north, Cochrane to the northwest, Strathmore to the east, and the Springbank and Bearspaw acreages to the west. Though it is not technically within Calgary's metropolitan area, the town of Okotoks is only a short distance to the south and is considered a suburb as well. The Calgary Economic Region includes slightly more area than the CMA and has a population of 1,251,600 in 2008.

The city has undertaken numerous land annexation procedures over the years to keep up with growth; the most recent was completed in July 2007 and saw the city annex the neighbouring hamlet of Shepard, and place its boundaries adjacent to the hamlet of Balzac and within very short distances of the city of Airdrie and town of Chestermere. Despite this proximity, there are presently no plans for Calgary to annex either Airdrie or Chestermere, and in fact Chestermere's administration has a growth plan in the works that calls for it annexing the intervening land between the town and Calgary.

The city of Calgary proper is immediately surrounded by two municipal districts, Rocky View No. 44 to the north, west and east; and Foothills No. 31 to the south.