Recurrence and recurrent may refer to:

• Disease recurrence, also called relapse
• Eternal recurrence, or eternal return, the concept that the universe has been recurring, and will continue to recur, in a self-similar form an infinite number of times across infinite time or space
• Historic recurrence, the repetition of similar events in history
• Poincaré recurrence theorem, Henri Poincaré's theorem on dynamical systems
• Radial recurrent artery – arising from the radial artery immediately below the elbow
• Recursive definition
• Recurrent neural network, a special artificial neural network
• Recurrence period density entropy, an information-theoretic method for summarising the recurrence properties of dynamical systems
• Recurrence plot, a statistical plot that shows a pattern that re-occurs
• Recurrence relation, an equation which defines a sequence recursively
• Recurrent rotation, a term used in contemporary hit radio for frequently aired songs
• Recurrence The Railway Children (band) album