Fusa is a municipality in Hordaland county, Norway. It is located east of the city of Bergen in the Midhordland region. The administrative centre of the municipality is the village of Eikelandsosen. Other villages in the municipality include Fusa, Holdhus, Holmefjord, Strandvik, and Sundvord. The Frank Mohn company's Fusa marine division is headquartered here, with almost 500 employees.

Fusa may refer to:

• Fusa, a municipality in Hordaland county, Norway
• Fusa (village), a village in Fusa municipality in Hordaland county, Norway
• Fusa Church, a church in Fusa municipality in Hordaland county, Norway
• Fusa, the commonly-used name for the Colombian town of Fusagasugá
• Fusa or Fussa, a town in Tokyo, Japan
• Fusa Province, an ancient province in Japan
• Fusa Station, a railway station in Japan
• FUSA, the Former United States of America, a hypothetical future group of independent nation-states