AV or Av may stand for:

• Adult video
• Altavista, a search engine
• Anti-Virus
• Censored page—used for animal artificial insemination, particularly with dairy bulls.
• Audio/Video
• Authorised Version or King James Version of the Bible (also KJV)
• Av or Ab, a month in the Hebrew calendar
• Avar language (ISO 639 alpha-2)
• avenue
• average
• the IATA code for Avianca