Salade niçoise (French pronunciation: ​[saˈlad niˈswaz]), salada nissarda in the Niçard dialect of the Occitan language, insalata nizzarda in Italian, is a salad that originated in the French city of Nice. It is traditionally made of tomatoes, hard-boiled eggs, Niçoise olives and anchovies or tuna, dressed with olive oil, or in some historical versions, a vinaigrette. It has been popular worldwide since the early 20th century, and has been prepared and discussed by many chefs. Delia Smith called it "one of the best combinations of salad ingredients ever invented" and Gordon Ramsay said that "it must be the finest summer salad of all".

Salade niçoise can be served either as a composed salad or as a tossed salad. Freshly cooked or canned tuna may be added. For decades, traditionalists and innovators have disagreed over which ingredients should be included; traditionalists exclude cooked vegetables. The salad may include raw red peppers, shallots, artichoke hearts and other seasonal raw vegetables. Raw green beans harvested in the spring, when they are still young and crisp, may be included. However, cooked green beans and potatoes are commonly served in variations of salade niçoise that are popular around the world.