Granholmen may refer to:

• Granholmen, Kalix, an island in the Kalix archipelago, Sweden
• Granholmen, Råne, an island in the Luleå archipelago, Sweden
• Granholmen, Sandefjord, an island in the Sandefjordsfjord, Norway
• Granholmen, Vaxholm Municipality, an island in Vaxholm municipality and the Stockholm archipelago, Sweden
• Granholmen, Värmdö Municipality, an island in Värmdö municipality and the Stockholm archipelago, Sweden