Fax may refers to:

• Fax, short for facsimile, a telecommunications technology used to transfer copies of documents over the telephone network.
• FAX +49-69/450464, a German record company releasing ambient music.
• FlyAsianXpress, commonly known as FAX, the airlines operated in Malaysia.
• Fresno Area Express, a public transit agency operating in Fresno.
• Fax (TV show), BBC children's show between 1985 and 1988.
• Fax (Pern), a character in Anne McCaffrey's Dragonriders of Pern series

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