| Coordinates: | 65.0401°N 24.5615°W |
| Yearbuilt: | 1871[1] |
| Yearlit: | 1872 |
| Automated: | 1962 |
| Construction: | masonry tower |
| Shape: | cylindrical, three-segment tower with balcony and lantern |
| Marking: | white tower, red lantern, green lantern dome |
| Height: | 25m (82feet) |
| Focalheight: | 30.2m (99.1feet) |
| Range: | 190NaN0 |
| Characteristic: | Fl (2) W 20s. |
Marjaniemi Lighthouse (fi|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 50km (30miles) west of Oulu. The lighthouse was designed by Axel Hampus Dalström as his fourth lighthouse and it was first lit in 1872.[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. There were two lighthouse keepers and a master until 1962 when the lighthouse was automated. A pilot station was built next to the tower, currently the pilot station serves as a hotel.
The lighthouse also houses a smaller sector light that is used to guide vessels to and from the fishing harbour. Today the lighthouse also houses a webcam.