Harissa is a Tunisian hot red sauce, the recipe of which may vary but usually includes chilli peppers (often smoked), coriander, cumin, caraway, and garlic in an olive oil base.It may also contain tomatoes.

It somewhat resembles sambal and chilli sauce. Harissa is used both as a condiment and as an ingredient. It has been described as the most important item in Tunisian cuisine, and can be found in other cuisines of North Africa, such as those of Morocco and Algeria.

The sauce is normally sold in tubes, cans or jars, and often eaten with couscous, with pasta, on sandwiches, and in soup. Harissa paste is also often used used as a meat rub and in marinades.