Yarn is a type of textile used for knitting.

Yarn may also refer to:

• Shaggy dog story, a long-winded anecdote also known as a yarn
• YARN, a software utility that is part of the Apache Hadoop collection
• Yarn, in Australian Aboriginal English, to share stories, sometimes for healing purposes (yarning circle)
• Yarn (package manager), a software packaging system for the Node.js JavaScript runtime environment
• Yarn (music group), a New York band