Sundøy or
Sundøya is a village in the municipality of
Leirfjord in
Nordland county,
Norway. The village is located about south of
Leland, and it has a population of about 120 people. It is located on the north side of the
Vefsnfjorden on the northeastern part of the
island of
Alsta, east of the
Seven Sisters mountains, which isolate it from the rest of the island. Since Sundøy is surrounded by mountains and water, it was only accessible by boat until 2003 when the
Sundøy Bridge was built, providing a road connection to the mainland of
Leirfjord.