IAL may refer to:

• Indoleacetaldehyde, an organic compound and metabolite of tryptamine

• Intel Architecture Labs, a research arm of Intel Corporation during the 1990s

• International Advanced Levels, an academic qualification offered by Edexcel

• International Algebraic Language or ALGOL 58

• International Artists' Lodge, a trade union in Germany

• International Association for Lichenology, a scientific organisation

• International auxiliary language, a language for communication between people who do not share a native language

• Institute for Adult Learning, an autonomous institute based in Singapore

• Ial, a commote in medieval Wales

• IAL, an Anatolian high school in Mersin, Turkey