Budweiser () is an American-style pale lager, part of Belgian company AB InBev. Introduced in 1876 by Carl Conrad & Co. of St. Louis, Missouri, Budweiser has become a large selling beer company in the United States.

Budweiser may also refer to an unrelated pale lager beer, originating in České Budějovice, Czech Republic (in German, Budweis) produced by the Budějovický Budvar brewery. There have been multiple trademark disputes between the two companies. Usually, either Anheuser-Busch or Budějovický Budvar are granted the exclusive use of the Budweiser name in a given market. Anheuser-Busch commonly uses the Bud brand for its beer when Budweiser is not available. The AB lager is available in over 80 countries, though not under the Budweiser name in places where Anheuser-Busch does not own the trademark. AB Budweiser is a filtered beer, available on draft and in bottles and cans, made with up to 30% rice in addition to hops and barley malt.