Formlessness may refer to:

• The lack of form
• Chaos (cosmogony), the formless or void state preceding the creation of the universe in the Greek creation myths
• Trailokya, world of formlessness, a noncorporeal realm populated with four heavens, possible rebirth destination for practitioners of the four formlessness stages
• Arupadhatu (the world of formlessness) in Borobudur
• Tohu wa-bohu (redirect from Formless and void), Genesis before creation
• Formless, book by Rosalind E. Krauss
• Formless, the 2nd album from progressive metal band Aghora, released in December, 2006
• Formlessness, an EP by American indie rock band The World Is a Beautiful Place & I Am No Longer Afraid to Die