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, trade union in Germany
• 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.
• Iâl or Ial or Yale, a commote in Medieval Wales.