Koroni or Coroni is a town and a former municipality in Messenia, Peloponnese, Greece.
Since the 2011 local government reform it is part of the municipality Pylos-Nestoras, of which it is a municipal unit. Known as Corone by the Venetians and Ottomans, the town of Koroni (pop. 1,668) sits on the southwest peninsula of the Peloponnese on the Gulf of Messinia in southern Greece 45 minutes southwest of Kalamata.
The municipal unit's next largest towns are Charokopeió (pop. 743), Chrysokellariá (528), and Vasilítsi (488). It also includes the uninhabited offshore island of Venétiko.
- Venetian Castle
- The town is nestled on a hill below an impressive Venetian castle and reaches to the edge of the gulf. The town was the seat of the former municipality of Koróni, which has a land area of 105.163 km² and a population of 5,067 (2001 census).