Messenia
| Messenia Περιφερειακή ενότητα Μεσσηνίας | |
|---|---|
| Municipalities of Messenia | |
| Coordinates: 37°10′N 22°0′E / 37.167°N 22.000°E | |
| Country | Greece | 
| Administrative region | Peloponnese | 
| Seat | Kalamata | 
| Area | |
|  • Total | 2,991 km2 (1,155 sq mi) | 
| Population  (2021) | |
|  • Total | 146,080 | 
| • Density | 49/km2 (130/sq mi) | 
| Time zone | UTC+2 (EET) | 
| • Summer (DST) | UTC+3 (EEST) | 
| Postal code | 24x xx | 
| Area code(s) | 272x0, 276x0 | 
| Vehicle registration | ΚΜ | 
Messenia or Messinia (/məˈsiːniə/ mə-SEE-nee-ə; Greek: Μεσσηνία [mesiˈni.a]) is a regional unit (perifereiaki enotita) in the southwestern part of the Peloponnese region, in Greece. Until the implementation of the Kallikratis plan on 1 January 2011, Messenia was a prefecture (nomos) covering the same territory. The capital and largest city of Messenia is Kalamata.