Marjaniemi Lighthouse (Finnish: Marjaniemen majakka) is a lighthouse located in the village of Marjaniemi at the westernmost point of Hailuoto island on the Gulf of Bothnia.

[2] The lighthouse is located approximately 50 kilometres (31 mi) west of Oulu.

[3] The tower is brick masonry, and has 110 steps inside with no intermediate floors.

Originally the light was equipped with a Fresnel lens system, and it displayed a white light towards a sector clockwise from south to northeast.

The lighthouse also houses a smaller sector light that is used to guide vessels to and from the fishing harbour.