Öja is an island in the Gulf of Bothnia in Kokkola (Karleby) municipality, Finland. It has an area of 90 square kilometres (35 sq mi). 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.
63°49′N 22°54′E / 63.817°N 22.900°E
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