Alberta is one of the thirteen provinces and territories of Canada. It is part of Western Canada and is one of the three prairie provinces. Alberta is bordered by British Columbia to the west, Saskatchewan to the east, the Northwest Territories (NWT) to the north, and the U.S. state of Montana to the south. It is one of the only two landlocked provinces in Canada. The eastern part of the province is occupied by the Great Plains, while the western part borders the Rocky Mountains. The province has a predominantly continental climate but experiences quick temperature changes due to air aridity. Seasonal temperature swings are less pronounced in western Alberta due to occasional chinook winds.

Alberta is the 6th largest province by area at 661,848 square kilometres and the 4th most populous, being home to 4,067,175 people. Alberta’s capital is Edmonton, while Calgary is its largest city. The two are Alberta’s largest census metropolitan areas (CMAs) and both exceed 1 million people. More than half of Albertans live in either Edmonton or Calgary, which contributes to continuing the rivalry between the two cities. English is the official language of the province. In 2016, 76.0% of Albertans were anglophone, 1.8% were francophone and 22.2% were allophone.

The oil and gas industry is also a part of the province’s identity. Alberta’s economy is based on hydrocarbons, petrochemical industries, livestock, agriculture and frontier technologies. The oil industry has been a pillar of Alberta’s economy since 1947, when substantial oil deposits were discovered at Leduc No. 1 well. Since Alberta is the province most rich in hydrocarbons, it provides 70% of the oil and natural gas exploited on Canadian soil. In 2018, Alberta’s output was CDN$338.2 billion, 15.27% of Canada’s GDP.

In the past, Alberta’s political landscape hosted parties like the left-wing Liberals and the agrarian United Farmers of Alberta, as well as the right-wing Social Credit Party and the Progressive Conservatives. Today, Alberta is generally perceived as a conservative province. The Progressive Conservatives held office continually from 1971 to 2015, the longest unbroken run in government at the provincial or federal level in Canadian history.

Before becoming part of Canada, Alberta was home to several First Nations and was a territory used by fur traders of the Hudson’s Bay Company. The lands that would become Alberta were acquired by Canada as part of the NWT on July 15, 1870. On September 1, 1905, Alberta was separated from the NWT as a result of the Alberta Act and designated the 8th province of Canada. From the late 1800s to early 1900s, many immigrants arrived, the biggest wave of which was pushed by Wilfrid Laurier, to prevent the prairies from being annexed by Americans. Massive oil resources were discovered in Alberta in 1947.

Alberta is renowned for its natural beauty, richness in fossils and for housing important nature reserves. Alberta is home to six UNESCO World Heritage Sites: The Canadian Rocky Mountain Parks, Dinosaur Provincial Park, the Head-Smashed-In Buffalo Jump, Waterton–Glacier International Peace Park, Wood Buffalo National Park and Writing-on-Stone Provincial Park. Other popular sites include: Banff, Canmore, Drumheller, Jasper, Sylvan Lake and Lake Louise.

Etymology

Alberta was named after Princess Louise Caroline Alberta (1848–1939), the fourth daughter of Queen Victoria. Princess Louise was the wife of John Campbell, Marquess of Lorne, Governor General of Canada (1878–83). Lake Louise and Mount Alberta were also named in her honour. The name “Alberta” itself is a feminine Latinized form of Albert, the name of Princess Louise’s father, the Prince Consort (cf. Medieval Latin: Albertus, masculine) and its Germanic cognates, ultimately derived from Proto-Germanic *Aþalaberhtaz (compound of “noble” + “bright/famous”).

Geography

A topographic map of Alberta, showing cities, towns, municipal district (county) and rural municipality borders, and natural features

Alberta, with an area of 661,848 km2 (255,500 sq mi), is the fourth-largest province after Quebec, Ontario and British Columbia.

Alberta’s southern border is the 49th parallel north, which separates it from the U.S. state of Montana. The 60th parallel north divides Alberta from the Northwest Territories. The 110th meridian west separates it from the province of Saskatchewan; while on the west its boundary with British Columbia follows the 120th meridian west south from the Northwest Territories at 60°N until it reaches the Continental Divide at the Rocky Mountains, and from that point follows the line of peaks marking the Continental Divide in a generally southeasterly direction until it reaches the Montana border at 49°N.

The province extends 1,223 km (760 mi) north to south and 660 km (410 mi) east to west at its maximum width. Its highest point is 3,747 m (12,293 ft) at the summit of Mount Columbia in the Rocky Mountains along the southwest border while its lowest point is 152 m (499 ft) on the Slave River in Wood Buffalo National Park in the northeast.

With the exception of the semi-arid steppe of the south-eastern section, the province has adequate water resources. There are numerous rivers and lakes used for swimming, fishing and a range of water sports. There are three large lakes, Lake Claire (1,436 km2 (554 sq mi)) in Wood Buffalo National Park, Lesser Slave Lake (1,168 km2 (451 sq mi)), and Lake Athabasca (7,898 square kilometres (3,049 sq mi)) which lies in both Alberta and Saskatchewan. The longest river in the province is the Athabasca River which travels 1,538 km (956 mi) from the Columbia Icefield in the Rocky Mountains to Lake Athabasca.

The largest river is the Peace River with an average flow of 2161 m3/s. The Peace River originates in the Rocky Mountains of northern British Columbia and flows through northern Alberta and into the Slave River, a tributary of the Mackenzie River.

Alberta’s capital city, Edmonton, is located at about the geographic centre of the province. It is the most northerly major city in Canada, and serves as a gateway and hub for resource development in northern Canada. The region, with its proximity to Canada’s largest oil fields, has most of western Canada’s oil refinery capacity. Calgary is about 280 km (170 mi) south of Edmonton and 240 km (150 mi) north of Montana, surrounded by extensive ranching country. Almost 75% of the province’s population lives in the Calgary–Edmonton Corridor. The land grant policy to the railroads served as a means to populate the province in its early years.

Moraine Lake at Banff National Park. The Alberta Mountain forests makes up the southwestern boundary of Alberta.

Most of the northern half of the province is boreal forest, while the Rocky Mountains along the southwestern boundary are largely forested (see Alberta Mountain forests and Alberta-British Columbia foothills forests). The southern quarter of the province is prairie, ranging from shortgrass prairie in the southeastern corner to mixed grass prairie in an arc to the west and north of it.

The central aspen parkland region extending in a broad arc between the prairies and the forests, from Calgary, north to Edmonton, and then east to Lloydminster, contains the most fertile soil in the province and most of the population. Much of the unforested part of Alberta is given over either to grain or to dairy farming, with mixed farming more common in the north and centre, while ranching and irrigated agriculture predominate in the south.

The Alberta badlands are located in southeastern Alberta, where the Red Deer River crosses the flat prairie and farmland, and features deep canyons and striking landforms. Dinosaur Provincial Park, near Brooks, Alberta, showcases the badlands terrain, desert flora, and remnants from Alberta’s past when dinosaurs roamed the then lush landscape.

Climate

Alberta extends for over 1,200 km (750 mi) from north to south; its climate, therefore, varies considerably. Average high temperatures in January range from 0 °C (32 °F) in the southwest to −24 °C (−11 °F) in the far north. The climate is also influenced by the presence of the Rocky Mountains to the southwest, which disrupt the flow of the prevailing westerly winds and cause them to drop most of their moisture on the western slopes of the mountain ranges before reaching the province, casting a rain shadow over much of Alberta.

The northerly location and isolation from the weather systems of the Pacific Ocean cause Alberta to have a dry climate with little moderation from the ocean. Annual precipitation ranges from 300 mm (12 in) in the southeast to 450 mm (18 in) in the north, except in the foothills of the Rocky Mountains where total precipitation including snowfall can reach 600 mm (24 in) annually.

Southeastern Alberta features a semi-arid steppe climate. Northern Alberta is mostly covered by boreal forest and has a subarctic climate. The agricultural area of southern Alberta has a semi-arid steppe climate because the annual precipitation is less than the water that evaporates or is used by plants.

The southeastern corner of Alberta, part of the Palliser Triangle, experiences greater summer heat and lower rainfall than the rest of the province, and as a result suffers frequent crop yield problems and occasional severe droughts. Western Alberta is protected by the mountains and enjoys the mild temperatures brought by winter chinook winds. Central and parts of northwestern Alberta in the Peace River region are largely aspen parkland, a biome transitional between prairie to the south and boreal forest to the north.

Alberta has a humid continental climate with warm summers and cold winters. The province is open to cold arctic weather systems from the north, which often produce extremely cold conditions in winter. As the fronts between the air masses shift north and south across Alberta, the temperature can change rapidly. Arctic air masses in the winter produce extreme minimum temperatures varying from −54 °C (−65 °F) in northern Alberta to −46 °C (−51 °F) in southern Alberta, although temperatures at these extremes are rare.

In the summer, continental air masses have produced record maximum temperatures from 32 °C (90 °F) in the mountains to over 40 °C (104 °F) in southeastern Alberta. Alberta is a sunny province. Annual bright sunshine totals range between 1,900 up to just under 2,600 hours per year. Northern Alberta gets about 18 hours of daylight in the summer. The average daytime temperatures range from around 21 °C (70 °F) in the Rocky Mountain valleys and far north, up to around 28 °C (82 °F) in the dry prairie of the southeast.

The northern and western parts of the province experience higher rainfall and lower evaporation rates caused by cooler summer temperatures. The south and east-central portions are prone to drought-like conditions sometimes persisting for several years, although even these areas can receive heavy precipitation, sometimes resulting in flooding.

In the winter, the Alberta clipper, a type of intense, fast-moving winter storm that generally forms over or near the province and, pushed with great speed by the continental polar jetstream, descends over the rest of Southern Canada and the northern tier of the United States. In southwestern Alberta, the cold winters are frequently interrupted by warm, dry chinook winds blowing from the mountains, which can propel temperatures upward from frigid conditions to well above the freezing point in a very short period.

During one chinook recorded at Pincher Creek, temperatures soared from −19 to 22 °C (−2.2 to 72 °F) in just one hour. The region around Lethbridge has the most chinooks, averaging 30 to 35 chinook days per year. Calgary has a 56% chance of a white Christmas, while Edmonton has an 86% chance.

After Saskatchewan, Alberta experiences the most tornadoes in Canada with an average of 15 verified per year. Thunderstorms, some of them severe, are frequent in the summer, especially in central and southern Alberta. The region surrounding the Calgary–Edmonton Corridor is notable for having the highest frequency of hail in Canada, which is caused by orographic lifting from the nearby Rocky Mountains, enhancing the updraft/downdraft cycle necessary for the formation of hail.