Port is a fortified wine from the Douro Valley in Portugal. It is a PDO and thus only wines from the region and meeting the relevant regulations may be labelled ‘Port’.

It is typically a sweet red wine, with an alcohol content around 20% abv, although dry and white versions do exist. While over 100 grape varieties are allowed in Port production, in reality, the main five used are Tinta Barroca, Tinto Cão, Tinta Roriz (Tempranillo), Touriga Francesca and Touriga Nacional. The wines are fortified before fermentation is complete, producing a sweet but high alcohol wine. They are then aged for varying amounts of time in both barrel and bottle to produce a range of styles.