A fish market is a marketplace used for marketing fish products. It can be dedicated to wholesale trade between fishermen and fish merchants, or to the sale of seafood to individual consumers, or to both. Retail fish markets, a type of wet market, often sell street food as well.

Fish markets range in size from small fish stalls, such as the one in the photo at the right, to the great Tsukiji fish market in Tokyo, turning over about 660,000 tonnes a year.

The term fish market can refer to the process of fish marketing in general, but this article is concerned with physical marketplaces.