Keskiniemi beacon tower (Keskiniemen tunnusmajakka in Finnish), also often referred as Karvo beacon tower, is a historic daymark located on a promontory of Keskiniemi in northwestern part of Hailuoto island in the Gulf of Bothnia in Finland. The tower was built in 1858 to alert the vessels about sandbars reaching northwest from the site. It is the oldest surviving navigational aid on Hailuoto island.