An enchilada (/ˌɛntʃɪˈlɑːdə/, Spanish: [entʃiˈlaða]) is a Mexican dish consisting of a corn tortilla rolled around a filling and covered with a savory sauce. Enchiladas can be filled with various ingredients, including meats, cheese, beans, potatoes, vegetables, or combinations. Enchilada sauces include chili-based sauces, such as salsa roja, various moles, tomato-based sauces, such as salsa verde, or cheese-based sauces, such as chile con queso.

The Royal Spanish Academy defines the word enchilada, as used in Mexico, as a rolled maize tortilla stuffed with meat and covered with a tomato and chili sauce. Enchilada is the past participle of the Mexican Spanish enchilar, "to add chili pepper to"; literally, "to season (or decorate) with chili".

Enchiladas originated in Mexico, where the practice of rolling tortillas around other food dates back at least to Aztec times. The people living in the lake region of the Valley of Mexico traditionally ate corn tortillas folded or rolled around small fish. Writing at the time of the Spanish conquistadors, Bernal Díaz del Castillo documented a feast enjoyed by Europeans hosted by Hernán Cortés in Coyoacán, which included foods served in corn tortillas. (Note that the native Nahuatl name for the flat corn bread used was tlaxcalli; the Spanish gave it the name tortilla.) The Nahuatl word for enchilada is chīllapītzalli [t͡ʃiːlːapiːˈt͡salːi], which is formed of the Nahuatl word for "chili", chīlli [ˈt͡ʃiːlːi] and the Nahuatl word for "flute", tlapītzalli [t͡ɬapiːˈt͡salːi]. In the 19th century, as Mexican cuisine was being memorialized, enchiladas were mentioned in the first Mexican cookbook, El cocinero mexicano ("The Mexican Chef"), published in 1831, and in Mariano Galvan Rivera's Diccionario de Cocina, published in 1845.

In their original form as Mexican street food, enchiladas were simply corn tortillas dipped in chili sauce and eaten without fillings. There are now many varieties, which are distinguished primarily by their sauces, fillings and, in one instance, by their form. Various adjectives may be used to describe the recipe content or origin, e.g. enchilada tapatia would be a recipe from Jalisco.

Varieties include:

Fillings include meat (e.g. beef, poultry, pork, seafood) or cheese, potatoes, vegetables, beans, tofu, and any combination thereof. Enchiladas are commonly topped or garnished with cheese, sour cream, lettuce, olives, chopped onions, chili peppers, sliced avocado, and salsa, or fresh cilantro.

In Costa Rica, the enchilada is a common, small, spicy pastry made with puff pastry and filled with diced potatoes spiced with a common variation of Tabasco sauce or other similar sauces. Other variations include fillings made of spicy chicken or minced meat.

In Honduras, enchiladas look and taste very different from those in Mexico; they are not corn tortillas rolled around a filling, but instead are flat, fried, corn tortillas topped with ground beef, salad toppings (usually consisting of cabbage and tomato slices), a tomato sauce (often ketchup blended with butter and other spices such as cumin), and crumbled or shredded cheese. They look and taste much like what many people call a tostada.