Heissa or Hessa is an island in Ålesund Municipality in Møre og Romsdal county, Norway. It is the westernmost island in the municipality and it is one of the main islands in the island-city of Ålesund. The island is located west and south of the island of Aspøya, south of Giske and Valderøya, east of Godøya, and north of Sula. The tall mountain Sukkertoppen is situated in the middle of the island.
The island contains mostly residential neighborhoods concentrated around the urban areas of Sævollen, Slinningen, and Skarbøvik. The island has an elementary school and a lower secondary school. Skarbøvik Church is the main church for the island's residents. The Atlantic Sea-Park is situated on Hessa.
Hessa or Hussa is an Arabic feminine given name, which means " destiny." The name may refer to:
- Hessa Al Jaber (born 1959), Qatari engineer and politician
- Hussa bint Ahmed Al Sudairi (1900–1969), Saudi Arabian princess
- Hessa bint Salman Al Khalifa (1933–2009), Bahraini queen