ASSI may refer to:

• Air Safety Support International, a subsidiary of the British Civil Aviation Authority
• Area of Special Scientific Interest, a conservation designation in the Isle of Man and Northern Ireland

• Clyde, GA
• Clyde, Georgia
• Clyde Goodman
• Clyde Griffiths
• Clyde Hamilton Coombs
• Clyde Hart
• Clyde H. Bellecourt
• Clyde H. Coombs
• Clyde Herring
• Clyde Hill
• Clyde Hill, WA
• Clyde Hill, Washington
• Clyde Hoey
• Clyde Hurley
• Clyde, Kansas
• Clyde Kennard
• Clyde King
• Clyde Kluckhohn
• Clyde, KS
• Clyde K. Wells
• Clyde L. Cowan
• Clyde L. Herring
• Clyde Lovellette
• Clyde McPhatter
• Clyde Milan