Oosterbierum (Dutch: [ˌoːstərˈbiːrʏm]; West Frisian: Easterbierrum [ˌjɛstr̩ˈbjɪrəm]) is a village in Waadhoeke municipality in the province of Friesland, the Netherlands.

[3] The village was first mentioned in the 13th century as Asterberen, and means "eastern houses/barns".

The ooster (east) has been added to distinguish from Westerbeeren which disappeared in a flood in 1322.

[4] Oosterbierum developed on a clay ridge near the Wadden Sea.

[5] The Dutch Reformed church dates from around 1200.