瓦隆古（Valongo）是葡萄牙的一座城市。有人口18,698人。

Valongo (Portuguese pronunciation: [vɐˈlõɡu]) is a Portuguese municipality located in the District of Porto. The city population is 18,698, and the municipality is composed of 4 parishes, of which three are cities (Alfena, Valongo and Ermesinde). The population in 2011 was 93,858, in an area of 75.12 km². The two most populous cities (and parishes) in the Valongo municipality are Ermesinde, with a population of 38,315, which is essentially a residential suburb of Porto and Alfena which has the most industry in the municipality.