Unilever is a British-Dutch multinational consumer goods company headquartered in London, England. Unilever products include food, condiments, bottled water, baby food, soft drink, ice cream, instant coffee, cleaning agents, energy drink, toothpaste, pet food, pharmaceutical and consumer healthcare products, tea, breakfast cereals, beauty products, and personal care. Unilever is the largest producer of soap in the world and its products are available in around 190 countries.

Unilever's largest brands include Lifebuoy, Dove, Sunsilk, Knorr, Lux, Sunlight, Rexona/Degree, Axe/Lynx, Ben & Jerry's, Omo/Persil, Heartbrand (Wall's) ice creams, Hellmann's and Magnum.

Unilever is organised into three main divisions: Foods & Refreshments, Home Care, and Beauty & Personal Care. It has research and development facilities in China, India, the Netherlands, the United Kingdom, and the United States.

Unilever was founded on 2 September 1929, by the merger of the British soapmaker Lever Brothers and the Dutch margarine producer Margarine Unie. In the 1930s, Unilever acquired the United Africa Company. During the second half of the 20th century, the company increasingly diversified from being a maker of products made of oils and fats and expanded its operations worldwide. It has made numerous corporate acquisitions, including Lipton (1971), Brooke Bond (1984), Chesebrough-Ponds (1987), Hellmann's and Best Foods (2000), Ben & Jerry's (2000), Slim-Fast (2000), Knorr (2000), Alberto-Culver (2010), Dollar Shave Club (2016) and Pukka Herbs (2017). Unilever divested its specialty chemicals businesses to ICI in 1997. In the 2010s, under the leadership of Paul Polman, the company gradually shifted its focus towards health and beauty brands and away from food brands showing slow growth.

Unilever has a primary listing on the London Stock Exchange and is a constituent of the FTSE 100 Index. Unilever has a secondary listing on Euronext Amsterdam and is a constituent of the AEX index.