The Ranfjorden (or just Ranfjord) is a fjord in the Helgeland district of Nordland county, Norway. The largest part of the fjord is in the municipality of Rana, but the fjord also passes through Hemnes, Vefsn, Leirfjord, Nesna, and Dønna. The river Ranelva meets the Ranfjord in at the town of Mo i Rana at the innermost part of the fjord.