加亚新城（葡萄牙语：Villa Nova de Gaia）是位于葡萄牙北部大区杜罗河畔的一座城市，人口约18万，是葡萄牙人口第三多的都市。

著名的波特酒主要藏于加亚新城的酒窑中，这也是该市的主要旅游景点。

Vila Nova de Gaia, or simply Gaia (Portuguese pronunciation: [ˈvilɐ ˈnɔvɐ ðɨ ˈɣajɐ]) is a city and a municipality in Porto District in Norte Region, Portugal. It is located south of the city of Porto on the other side of the Douro River. The city proper had a population of 178,255 in 2001. The municipality has an area of 168.46 km². and a total population of 302,295 inhabitants (2011), making it the most populous municipality in Norte Region. Gaia together with Porto and 12 other municipalities makes up the commonly designated Porto Metropolitan Area.