Ølensjøen or Ølen is the administrative centre of Vindafjord municipality in Rogaland county, Norway.

[3] Ølensjøen is the regional center for commerce for the inner part of the Haugalandet area.

It has a secondary school, sports club, and a public swimming pool.

Norway's largest privately owned slaughterhouse, Fatland slakteri, is located in Ølensjøen.

There is a large shopping center with a pharmacy and post office in Ølensjøen that serves the residents of the Etne-Vindafjord area.