Floating city may mean:

• Floating city (science fiction), settlements that use buoyancy to remain in the atmosphere of a planet
• Ocean colonization, the theory and practice of building structures to allow humans to live permanently in areas of Earth covered in water

Floating city may also refer to:

• Freedom Ship, a concept for a floating city ship proposed by Norman Nixon of Freedom Ship International.
• America World City, a concept for a floating city ship proposed by John Rogers of World City Corporation
• "Floating City" (song), by Tori Amos' 1980s synthpop band
• Raft Cities