Öja is a village in Halmstad Municipality, in Halland County, Sweden. Öja lies at 71 m above sea level. The nearest city is Halmstad, 19.2 km to the southwest. Among the landmarks around are St. Nicholas Church (19.3 km), Enslöv Church (9.3 km) and Vapnö Church (18.2 km). Among the natural features are Danska fall (13.4 km).