IKEA ( eye-KEE-ə, Swedish: [ɪˈkêːa]), is a multinational conglomerate founded in Sweden that designs and sells ready-to-assemble furniture, household goods, and various related services.

IKEA is owned and operated by a series of not-for-profit and for-profit corporations collectively known and managed as Inter IKEA Group and Ingka Group. The IKEA brand itself is owned and managed by Inter IKEA Systems B.V., a company incorporated and headquartered in the Netherlands.

IKEA was started in 1943 by Ingvar Kamprad, and has been the world's largest furniture retailer since 2008. The brand name is an acronym of founder Ingvar Kamprad's initials; Elmtaryd, the family farm where Kamprad was born; and the nearby village of Agunnaryd, Kamprad's hometown in Småland, southern Sweden.

The group is primarily known for its modernist furniture designs, simple approach to interior design, and its immersive shopping concept, based around decorated room settings within big-box stores, where customers can interact with products onsite. In addition, the firm is known for its attention to cost control and continuous product development, notably, the ready-to-assemble model of furniture sales, and other elements which have allowed IKEA to establish lower prices than its competitors.

As of September 2024, there are 473 IKEA stores operating in 63 countries and in fiscal year 2024, €45.1 billion worth of IKEA goods were sold. For multiple reasons, including lowering taxes payable, IKEA uses a complicated corporate structure in which IKEA stores are operated under franchise from Inter IKEA Systems B.V. which handles branding, design, manufacturing, and supply. Another part of the IKEA group, Ingka Group, operates the majority of IKEA stores as a franchisee and pays royalties to Inter IKEA Systems B.V. Some IKEA stores are also operated by independent franchises. The IKEA website contains about 12,000 products and there were over 4.6 billion visitors to IKEA's websites in FY2024.