A banquet (/ˈbæŋkwɪt/; French: [bɑ̃kɛ]) is a formal large meal where a number of people consume food together. Banquets are traditionally held to enhance the prestige of a host, or reinforce social bonds among joint contributors. Modern examples of these purposes include a charitable gathering, a ceremony, or a celebration. They often involve speeches in honor of the topic or guest of honour.

The older English term for a lavish meal was feast, and "banquet" originally meant a specific and different kind of meal, often following a feast, but in a different room or even building, which concentrated on sweet foods of various kinds. These became highly fashionable as sugar became much more common in Europe at the start of the 16th century. It was a grand form of the dessert course, and special banqueting houses, often on the roof or in the grounds of large houses, were built for them. Such meals are also called a "sugar collation".

Banquets feature luxury foods, often including animal meat. Feasts can be divided into two fundamental types: solidarity (or alliance, or empowering) and promotional (or aggrandize, competitive, or diacritical). Solidarity feasts are a joint effort in which families or communities bring equivalent contributions together to reinforce the social ties of all concerned. Promotional feasts are intended to enhance the social status of the host, who provides the food to create obligations to themselves among the guests. Feasting is related to the control of food production and often is seen as a medium for social interaction, serving as both a way to create prestige for the host and to create commonality within a community through the sharing of food.

The earliest archaeological evidence of feasting is at the Natufian site of Hilazon Tachtit Cave, where evidence suggests a feast was conducted at an elderly woman's burial about 12,000 years ago.

Communal feasting is evidenced from the early Neolithic in Britain. In Ancient Greece, symposia formed a routine part of life, involving the celebratory drinking of wine, conversation and performances of poetry and music.

Notable historical and legendary examples of banquets include Belshazzar's Feast, the Last Supper, the Manchu Han Imperial Feast, and mead halls.

A luau is one variety of traditional banquet originally used in Hawaii.

Many cultures have developed structures for banquets. In the European Middle Ages, comprehensive ritualised elements were involved in a traditional three-course menu, having up to 25 dishes in each course (this structure persisted into the 19th century). The structure was later altered to two courses, with the pre-existing third course changed to the serving of fruit and nuts.