Leirfjorden[1] is a fjord in Leirfjord Municipality and Alstahaug Municipality in Nordland county, Norway.

The 20-kilometre (12 mi) long fjord is located east of the town of Sandnessjøen, between the mainland and the island of Alsta.

There is a short strait that connects it to the Vefsnfjorden to the south.

The village of Leland lies on the northern coast and the village of Sundøya lies on the southern coast.

This Nordland location article is a stub.