Rösti or rööschti (Alemannic German: [ˈrøːʃti]) is a Swiss dish consisting mainly of potatoes, sautéed or shallow-fried in a pan. It was originally a breakfast dish, commonly eaten by farmers in the canton of Bern, but is now eaten all over Switzerland and around the world. The French name röstis bernois directly refers to the dish's origins.

Many Swiss people consider rösti to be a national dish. Rather than considering it a complete breakfast, lunch or dinner, it is more commonly served to accompany other dishes such as Spinat und Spiegelei (spinach and fried eggs, sunny side up), cervelas or Fleischkäse. It is commonly available in Swiss restaurants as a replacement for the standard side dish of a given meal.