Bisa or BISA may refer to:

• Bisa (name), list of people with the name
• Belgian Institute for Space Aeronomy
• A Swedish nickname for the name Tobias
• The Bissa people tribe of Burkina Faso or their language, both sometimes spelled "Bisa"
• A surname or subcaste name of the Agrawal in India
• Bisa (island), an island in the Obi group of Indonesia
• Business Information Security Architect, a specialized role within the Information Security realm
• Bisa is a nickname for Biserka, a Serbo-Croat name meaning "pearly" for the helmeted guineafowl
• The British International Studies Association.
• Battle Information System Application