Gambrinus (pronounced [ˈgambrɪnus]) is a beer brewed in the Czech Republic at the Pilsner Urquell Brewery.

It is one of the most popular beers in the Czech Republic.

The beer is named after Gambrinus, a legendary European king known for his mythical brewing abilities.

Gambrinus brews these different types of beer, which are supplied by Plzeňský Prazdroj: This brand is used by many other breweries in Germany and Denmark and has been used in the United States.

In Mendig (Rhineland-Palatinate) the Gambrinusfest beer festival is held every two years.