Regenesis or ReGenesis may refer to:

• Regeneration (biology), the regenesis of amputated or damaged cells, tissues or even organs.
• ReGenesis, a Canadian television series
• Regenesis (non-profit organization), an environmental group
• Regenesis (novel), by C. J. Cherryh
• ReGenesis (band), a Genesis tribute band
• X-Men: Regenesis, a Marvel Comics storyline
• Regenesis: How Synthetic Biology Will Reinvent Nature and Ourselves, a book by George M. Church
• Regenesis: Feeding the World Without Devouring the Planet, a 2022 book by George Monbiot