Long John Silver's, formerly known as Long John Silver's Seafood Shoppes and sometimes abbreviated as LJS, is an American chain of fast-food restaurants that specializes in seafood. The brand's name is derived from the character of the same name from Robert Louis Stevenson's novel Treasure Island.

Long John Silver is a fictional character and the main antagonist in the novel Treasure Island (1883) by Robert Louis Stevenson. The most colourful and complex character in the book, he continues to appear in popular culture. His missing leg and parrot, in particular, have greatly contributed to the image of the pirate in popular culture.