Sagfjord Church is a parish church of the Church of Norway in Hamarøy Municipality in Nordland county, Norway. It is located in the village of Karlsøy on the island of Finnøya. It is one of the churches for the Sagfjord parish which is part of the Ofoten prosti (deanery) in the Diocese of Sør-Hålogaland. The white, wooden church was built in a long church style in 1886 using plans drawn up by the architect S. Mathisen. The church seats about 130 people.