The village was first mentioned in 1435 as "totten cleynen Waldammen toe, die men heet op desen voorsz.

The dam was founded in 1332 when Count William III had dikes built around a side-arm of the river Waal.

[3] As it is currently a dead branch of the river, the locals commonly refer to it as the Waaltje, meaning Little Waal.

Oostendam is located on the island of IJsselmonde, which is largely occupied by the nearby city of Rotterdam.

In 2000, the church was extended and the former day care centre was redesigned as consistory.