The word leaf may refer to:

• Leaf, an organ of a plant.
• A sheet of paper in a book or periodical, with each side forming a page.
• A leaf node (computer science).
• Leaf (company), a Japanese ren'ai video game company.
• Leaf Phoenix, an American actor now known as Joaquin Phoenix

Possible misspelling:

• The Scandinavian name is spelt Leif, e.g., Leif Ericson.
• Liege and Lief is an album by the Fairport Convention