Agartha (sometimes Agharta, Agartta, Agharti, Agarath, Agarta or Agarttha) is a mythical kingdom that appears in occultist writings.

These terms or variations upon them may also be used to refer to:

• Agharta, an album by Miles Davis named for the mythical city
• Agharta, a manga series by Takaharu Matsumoto
• Agartha, a 2017 album by Vald
• Ergenekon (allegation), a Turkish coup trial also referred to as "Ergenekon/Agartha"
• "Argatha", a song by the Sword from the album High Country
• "Agartha", a single for flute and electronic sounds by Juan María Solare
• Agharta: The Hollow Earth, a 2000 video game
• “Aghartha”, a song from the 2009 Sunn O))) album Monoliths & Dimensions