IKEA was founded in 1943 by Ingvar Kamprad in Sweden and it is owned by a Dutch-registered foundation controlled by the Kamprad family. IKEA is an acronym comprising the initials of the founder's name (Ingvar Kamprad), the farm where he grew up (Elmtaryd), and his home county (Agunnaryd, in Småland, South Sweden).

INGKA Holding B.V. is the parent company for all IKEA Group companies, including the industrial group Swedwood, which manufactures IKEA furniture, the sales companies that run IKEA stores, as well as purchasing and supply functions, and IKEA of Sweden, which is responsible for the design and development of products in the IKEA range. INGKA Holding B.V. is wholly owned by Stichting INGKA Foundation, which is a non-profit foundation registered in Leiden in the Netherlands.

Inter IKEA Systems B.V. in Delft, also in the Netherlands, owns the IKEA concept and trademark, and there is a franchising agreement with every IKEA store in the world. The IKEA Group is the biggest franchisee of Inter IKEA Systems B.V. Inter IKEA Systems B.V. is not owned by INGKA Holding B.V., but by Inter IKEA Holding S.A. registered in Luxemburg, which in turn is part of Inter IKEA Holding registered in the Netherlands Antilles. The ownership of the holding companies has not been disclosed.

IKEA is generally pronounced /i'ke.a/ but in many English-speaking regions, it is pronounced /ai'kiːə/, rhyming with the word "idea." As such, IKEA brought action in the Supreme Court of British Columbia successfully preventing a competitor in Victoria from using the name "Idea." It is generally pronounced /i'ki.a/ in China, Singapore and Taiwan. Its Chinese name is "yíjiā", which literally means "fit for home" in written Chinese and sounds like the phrase "right now" in Cantonese pronunciation.

The IKEA Website contains about 12,000 products and is the closest representation of the entire IKEA range. There were over 470 million visitors to the IKEA websites in the year from Sep. 2007-Sep. 2008

IKEA has shown leadership in adopting more environmentally friendly measures in its manufacturing processes. In 1990, IKEA adopted The Natural Step framework as the basis for its environmental plan (see "Environmental performance," below).

Originally, IKEA sold pens, wallets, picture frames, table runners, watches, jewelry and nylon stockings or practically anything Kamprad found a need for that he could fill with a product at a reduced price. Furniture was first added to the IKEA product range in 1948 and, in 1955, IKEA began to design its own furniture. The company motto is: "To create a better everyday life for the many people."

At first, Kamprad sold his goods out of his home and by mail order, but eventually a store was opened in the nearby town of Älmhult. It was also the location for the first IKEA "warehouse" store which came to serve as a model for IKEA establishments elsewhere. On 23 March 1963, the first store outside Sweden was opened in Asker, a Norwegian municipality outside Oslo.

Newer IKEA stores, like the one in Koblenz, Germany, make more use of glass, both for aesthetic and functional reasons. Skylights are also now common in the Self-serve warehouses. More natural light reduces energy costs, improves worker morale and gives a better impression of the product.

Whilst the original design involved the warehouse on the lower level and the showroom and marketplace on the upper, today most stores globally have the Showroom upstairs with the marketplace and warehouse downstairs. Additionally, some stores are single level. Some stores maintain separate warehouses to allow more stock to be kept on-site at any given time, although this occasionally results in challenges in finding the items, as well as a perception of having to queue in line twice. Single-level stores are found predominantly in areas where the cost of land would be less than the cost of building a 2-level store – examples include the store in Saarlouis, Germany and Haparanda, Sweden.

Most IKEA stores offer an "as-is" area at the end of the warehouse just prior to the cashiers. Returned, damaged and formerly showcased products which are not in new condition or taken out of the IKEA product range are displayed here, and sold with a significant discount, but also with a "no-returns" policy. Most IKEA stores communicate the IKEA policy on environmental issues in the "as-is." In the United Kingdom, Canada and Australia, this is referred to as "Bargain Corner."

In Hong Kong, where shop space is limited and costly, IKEA has opened three outlets across the city, which are actually part of shopping malls. They are tiny compared to common "large blue box" store design, but are huge by Hong Kong standard. Most of the outlets still have a "one-way" layout. An exception is the newest outlet in Telford Plaza, where the three independent floors can be accessed freely from each. Following IKEA tradition, though, the only cashier is located on the lowest floor.