Ambam is a town and commune in the Vallée-du-Ntem department of Cameroon's South Province. It lies on the country's southern border, at the frontier with Equatorial Guinea and Gabon.
The town is located roughly 220 kilometres from Yaoundé, Cameroon's capital. As of 2005, Ambam had a population of 41,089. The Fang are the main ethnic group in the area.
As a frontier town, Ambam has traditionally traded with its neighbouring countries across the border.