维亚芒（葡萄牙语：Viamão）是巴西南里奥格兰德州的一座城市，人口约26万（2006年）。

Viamão is a city in Rio Grande do Sul, Brazil. In size it is the largest municipality in the metropolitan region of Porto Alegre and the seventh most populous in the state.

The origin of the name Viamão is controversial. The more common explanation is that atop the hills of the region it is possible to see the Guaíba River and its five inlets: Jacuí, Caí, Gravataí, Taquari and Rio dos Sinos, which form an open hand. This is said to have lent the city its name -from the phrase "Vi a mão," meaning, "I saw the hand."