Fon might refer to various different things:

• Fon people is a major West African ethnic and linguistic group
• FON, a WiFi sharing business
• FON - Faculty for menagement and programming
• Federation of Ontario Naturalists, a non-profit organization that promotes the conservation of natural areas in Ontario, Canada.
• Fiber Optic Network or Fibre Optic Network
• Fon, a title of the Executive Branch of Government and Other Sub-National Rulers
• Fon (Cameroon), a title held by certain traditional rulers in Cameroon