Käringön has been inhabited since the 16th century, and the island became a chapel parish in 1795. The church was completed and taken into use in the autumn of 1796, allowing the roughly 300 inhabitants of the time to worship in a church of their own. It stands 22 by 9 metres, with a 20-metre-high west tower topped by an octagonal lantern and a copper-clad spire. For about a century the exterior was painted red, though it is white today. An original south-facing chancel entrance was removed in 1952, when a sacristy was added on the east side instead.
The interior has remained largely unchanged since the church was built. Behind the organ loft's parapet are eighteenth-century paintings of the apostles, Moses and Aaron, which were painted over in the early 1800s and only rediscovered and revealed again in the early twentieth century.
The altarpiece, dated 1670, was originally a memorial tablet (an epitaph) for a vicar of Morlanda, and its lower panel depicts the institution of the Lord's Supper; it was restored in 2008 in an attempt to recreate its original colouring. Nearby stands a greyish-white baptismal font from 1901. The pulpit's carved basket dates from the seventeenth century and was a gift from the neighbouring village of Fiskebäckskil, while its sounding board is a later, twentieth-century carving. The communion chalice and paten, in gilded silver, carry an engraving from 1796 recording that they were donated by five local men.
The church's first organ was funded by a bequest from a widow on the island who died in 1875; the current instrument dates from 1915. The tower's original bell, cast in 1797 and donated by a fishing company on the island, was later replaced by a larger and a smaller bell.
Outside the church stand a stone and an anchor, and inside are memorial tablets dedicated, according to one source, in 1993, commemorating islanders lost at sea. The churchyard's first recorded burial was a widow interred in 1797.