Involution may refer to:

• Involution (mathematics), a function that is its own inverse
• Involution algebra, a *-algebra: a type of algebraic structure
• Involute, a construction in the differential geometry of curves
• Exponentiation (archaic use of the term)

• Involution (medicine), the shrinking of an organ (such as the uterus after pregnancy)
• Neijuan, or involution, a Chinese social concept
• Agricultural Involution, a 1963 study of intensification of production through increased labour inputs
• Involution (esoterism), several notions of a counterpart to evolution
• Involution (Meher Baba), the inner path of the human soul to the self as described by Meher Baba
• Involution (Sri Aurobindo), term in the philosophy of Sri Aurobindo
• Involution (album), a 1998 music album by Michael Marcus and the Jaki Byard trio