Forever 21
| Forever 21 | |
| Company type | Private | 
| Industry | Apparel | 
| Founded | April 16, 1984 | 
| Founders | Do Won Chang and Jin Sook Chang | 
| Defunct | May 1, 2025 (U.S. operations only) | 
| Fate | Bankruptcy and liquidation (U.S. operations only) | 
| Headquarters | United States  | 
| Number of locations | 190 (after US shutdown) | 
| Area served | Worldwide | 
| Key people | Winnie Park (CEO) | 
| Products | Clothing, accessories | 
| Owner | Authentic Brands Group | 
| Number of employees | 43,000 (2019) | 
| Parent | Catalyst Brands | 
| Subsidiaries | 
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| Website | forever21 | 
F21 OpCo LLC, doing business as Forever 21, was a multinational fast-fashion retailer. It was originally founded as Fashion 21 in Highland Park, Los Angeles in 1984. Before its closure in the US, it was owned and operated by Catalyst Brands, with about 540 outlets. The IP is currently owned by Authentic Brands Group.
The company sold accessories, beauty products, home goods, and clothing for women, men and children. The company has been involved in various controversies that include labor practice issues and copyright infringement accusations. It is also still operating in Mexico, and other countries.