Modon may refer to:

• The name given by the Venetians to the town of Methoni, Messenia, in Greece
• Latin Bishopric of Modon, a titular diocese of the Roman Catholic church whose seat was Methoni
• MODON, a business name of the Saudi Industrial Property Authority
• Modon (river) [fr], a tributary of the Cher, in France
• Modon (fluid dynamics), or dipole eddy pair.