Unilever PLC () is a British multinational consumer packaged goods company headquartered in London, England. It was founded on 2 September 1929 following the merger of Dutch margarine producer Margarine Unie with British soap maker Lever Brothers.

The company's products include baby food, beauty products, bottled water, breakfast cereals, cleaning agents, condiments, dairy products, energy drinks, healthcare and hygiene products, ice cream, instant coffee, instant noodles, pet food, pharmaceuticals, soft drinks, tea, and toothpaste. It is the largest producer of soap in the world, and its products are available in over 190 countries.

The company is organised into five business groups: Beauty & Wellbeing, Personal Care, Home Care, Nutrition, and Ice Cream. It has research and development facilities in China, India, the Netherlands, Pakistan, the United Kingdom, and the United States.

In the 1930s, Unilever acquired the United Africa Company. In 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), Pond's (1987), Hellmann's (2000), Ben & Jerry's (2000), SlimFast (2000), Knorr (2000), Alberto-Culver (2010), Dollar Shave Club (2016), and Pukka Herbs (2017). Unilever divested its speciality chemicals businesses to Imperial Chemical Industries 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 that showed slow growth.

Unilever is listed on the London Stock Exchange with secondary listings on the Euronext Amsterdam and the New York Stock Exchange and is a constituent of the FTSE 100 Index.