Asin or asin may refer to:

• Asin Thotumkal, an Indian actress.
• Asin (band), a Filipino rock band.
• Asin (company), a Chilean company.
• Asín, in Aragon, Spain
• Amazon Standard Identification Number, or Amazon Standard Item Number, used by Amazon.com to identify its products.
• arcsine, an inverse trigonometric function.

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