L'Oréal's global headquarters is located in Clichy, France.
L'Oréal is one of the world's largest cosmetics and beauty companies. Its headquarters stands in Clichy, a commune immediately northwest of Paris in the Hauts-de-Seine department. The location places the company within the Paris metropolitan area while remaining outside the administrative boundaries of the city of Paris.
Eugène Schueller founded the company in 1909 after developing a hair-dye formula. It began as a specialist hair-color business and expanded into skin care, makeup, hair care, and fragrances through research, brand development, and acquisitions.
Paris is a common but less precise answer because Clichy is part of the capital's urban area and is closely connected to it. However, the headquarters address and company references identify Clichy as the specific commune. That distinction matters in a headquarters-location question.