IANSA may refer to:
- IANSA (company), a Chilean sugar refining company founded in 1953.
- IANSA (NGO), an international non-governmental organisation against gun violence.
- Interdisciplinaria Archaeologica Natural Sciences in Archaeology, a European academic society.
- Iansã, an alternative name for the Orisha Oya in Latin America
disambiguation page lists articles associated with the title IANSA.
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