Although it accounts for only about two percent of production, vintage port is the flagship wine of all Portugal. Vintage port is made entirely from the grapes of a declared vintage year. Not every year is declared a vintage in the Douro; only those when conditions are favourable to the production of a fine and lasting wine. The decision on whether or not to declare a vintage is made in the spring of the second year following the harvest.

The decision to declare a vintage is made by each individual port house, often referred to as a 'shipper'. The port industry is one where reputations are hard won and easily lost, so the decision is never taken lightly. During periods of recession and war, potential 'declarations' have sometimes been missed for economic reasons. In recent years, some shippers have adopted the 'chateau' principle for declarations, declaring all but the worst years. More conventional shippers will declare, on average, about three times a decade.

While it is by far the most renowned type of port, from a volume and revenue standpoint, vintage port actually makes up only a small percentage of the production of most shippers. Vintage ports are aged in barrels for a maximum of two and a half years before bottling, and generally require another ten to thirty years of aging in the bottle before reaching what is considered a proper drinking age. Since they are aged in barrels for only a short time, they retain their dark ruby colour and fresh fruit flavours. Particularly fine vintage ports can continue to gain complexity and drink wonderfully for many decades after they were bottled, and therefore can be particularly sought after and expensive wines.

Single Quinta Vintage Port is vintage port produced from a particular vineyard and sometimes from a lesser "undeclared" year. However, some of the most renowned Vintage Ports are Single Quintas.

Vintage port should not be confused with Late Bottled Vintage.