波尔多（Bordeaux；法语：[bɔʁ.do])；加斯科：Bordèu；巴斯克语：Bordele） 是位于法国西南的一个港口城市，拥有人口925,253人（1999年），是法国位居巴黎、 里昂、马赛之后的第四大城市。它是阿基坦大区和吉伦特省的首府。曾是法国旧省吉耶纳的首府，历史上属加斯科涅地区。

波尔多是欧洲的军事、航天和航空的研究与制造中心，集中了如欧洲航空防务与航天公司、泰勒斯集团等很多公司的研发机构，以及一些导弹发动机工厂和达梭航太的飞机制造厂等。它还是法国战略核弹研究和物理实验的核心，拥有原子能研究中心和兆焦激光计划等许多高端技术机构，此外还有新材料和纳米技术方面的研究机构。

Bordeaux (French pronunciation: ​[bɔʁdo]; Gascon: Bordèu) is a port city on the Garonne River in the Gironde department in southwestern France.

The municipality (commune) of Bordeaux proper has a population of 243,626 (2012). Together with its suburbs and satellite towns Bordeaux is the center of the Bordeaux Métropole, which with 749,595 inhabitants (as of 2013) is the 5th largest in France. It is the capital of the Aquitaine-Limousin-Poitou-Charentes region, as well as the prefecture of the Gironde department. Its inhabitants are called "Bordelais" (for men) or "Bordelaises" (women). The term "Bordelais" may also refer to the city and its surrounding region.