波特酒（英语：Port Wine，葡萄牙语：Vinho do Porto，Porto，Port）也称为“钵酒”或“砵酒”、“波尔图酒”，是葡萄牙的加强葡萄酒，生产于位于葡萄牙北部省份的杜罗河谷。它通常是甜的红葡萄酒，经常作为甜点酒，也有干型，半干型和白色的品种。像波特酒这样风格的加烈葡萄酒在葡萄牙以外地区也有生产，最引人注目的是澳大利亚，南非，加拿大，印度，阿根廷以及美国。根据欧洲联盟指定受保护的原产地准则，只有来自葡萄牙的产品可能会被标记为波特酒（Port或Porto）。在美国，标记为波特酒的葡萄酒可能来自于世界各地，，而"Dão"、"Oporto"、"Porto",和"Vinho do Porto" 则成为国外的、非通用名称，被用在来自葡萄牙的进口葡萄酒。

Port wine (also known as Vinho do Porto, Portuguese pronunciation: [ˌviɲuduˈpoɾtu], Porto, and usually simply port) is a Portuguese fortified wine produced exclusively in the Douro Valley in the northern provinces of Portugal. It is typically a sweet, red wine, often served as a dessert wine, though it also comes in dry, semi-dry, and white varieties. Fortified wines in the style of port are also produced outside Portugal, most notably in Australia, France, South Africa, Canada, India, Argentina, and the United States. Under European Union Protected Designation of Origin guidelines, only the product from Portugal may be labelled as port or Porto. In the United States, wines labelled "port" may come from anywhere in the world, while the names "Dão", "Oporto", "Porto", and "Vinho do Porto" have been recognised as foreign, non-generic names for wines originating in Portugal.