Öja (Finland)

Öja is an island in the Gulf of Bothnia in Kokkola (Karleby) municipality, Finland. It has an area of 90 km2. Öja is also the name of a settlement on the island with a population of 800.

Öja was an independent municipality until 1969, when it was consolidated to Kaarlela. Kaarlela was consolidated to Kokkola in 1977.