Haynes may refer to:

• Haynes (surname)

• Haynes, Western Australia

• Haynes, Alberta

• Haynes, Bedfordshire
  • Haynes Church End

• Haynes, Arkansas
• Haynes, North Dakota
• Haynes, Ohio
• Haynes Township, Michigan

• Haynes International, a US corporation specializing in corrosion-resistant metal alloys
• Haynes Manuals, set of manuals for automobile repair and other do it yourself projects
• Haynes Automobile Company, a defunct American automobile company
• John C. Haynes & Co., a musical instrument maker
• William S. Haynes Flute Company, American flute maker
• Haynes v. United States, a United States Supreme Court decision
• Haynes International Motor Museum, a motor museum in Sparkford, Somerset, England.

• Haine
• Hayne
• Haines (disambiguation)
• Hanes
• Hayes
• Hawnes