The bell pepper (also known as sweet pepper, pepper or capsicum /ˈkæpsɪkÉ™m/) is the fruit of plants in the Grossum cultivar group of the species Capsicum annuum. Cultivars of the plant produce fruits in different colours, including red, yellow, orange, green, white, and purple. Bell peppers are sometimes grouped with less pungent pepper varieties as "sweet peppers". While they are fruits—botanically classified as berries—they are commonly used as a vegetable ingredient or side dish.

Peppers are native to Mexico, Central America, and northern South America. Pepper seeds were imported to Spain in 1493 and then spread through Europe and Asia. The mild bell pepper cultivar was developed in the 1920s, in Szeged, Hungary.  Preferred growing conditions for bell peppers include warm, moist soil in a temperature range of 21 to 29 °C (70 to 84 °F).