Fasa (, also Fassa) is a city in and the capital of Fasa County, Fars Province, Iran. At the 2006 census, its population was 90,251, in 22,097 families.
Fasa is an Iranian city.
Fasa or FASA may also refer to:
- FASA, an American publisher of role-playing games, wargames and boardgames
- FASA Studio or FASA Interactive, a spin-off videogame company
- Federated Ambulatory Surgery Association, a US nonprofit association representing the interests of ambulatory surgery centers (ASCs)
- Fasa County, a county in Fars province, Iran
- FASA-Renault, a former Spanish automobile manufacturing company
- Federación Argentina de Ski y Andinismo, Argentine skiing and mountaineering federation
- Fasa, A Peruvian pharmacy chain.