Phase 5, Phase V or Phase Five may refer to:

• Marvel Cinematic Universe: Phase Five, an in-development group of superhero films and television series
• Phase5, a hardware manufacturer for the Amiga computer
• Deployment phase 5, a final deployment phase of a U.S. Marine Corps reconnaissance force
• Pandemic phase 5, the second highest level of a pandemic alert
• Phase 5, Mohali, a residential area of Mohali, Punjab