葡萄牙共和国（葡萄牙语：República Portuguesa），通称葡萄牙或葡国（葡萄牙语：Portugal，明朝时称佛朗机、波而都瓦尔及蒲都丽家等，坤舆万国全图称波尔杜葛尔，清朝时称博都雅，而澳门有译葡萄牙民国），是欧洲伊比利亚半岛上的一个国家，其国际代码为PT。其国名源自拉丁语的Portus Cale，字面意义为「加里人的港口」。葡萄牙的西部和南部濒临大西洋，北部和东部则与西班牙相接；首都里斯本以西的罗卡角是欧洲大陆的最西端。除了欧洲大陆的本土之外，大西洋的亚速群岛和马德拉群岛也是葡萄牙的领土。

Portugal (Portuguese: [puɾtuˈɣaɫ]), officially the Portuguese Republic (Portuguese:República Portuguesa), is a country on the Iberian Peninsula, in Southwestern Europe. It is the westernmost country of mainland Europe, being bordered by the Atlantic Ocean to the west and south and by Spain to the north and east. The Portugal–Spain border is 1,214 km (754 mi) long and considered the longest uninterrupted border within the European Union. The republic also includes the Atlantic archipelagos of the Azores and Madeira, both autonomous regions with their own regional governments.