Rio, Greece
| Rio Ρίο | |
|---|---|
| Coordinates: 38°18′N 21°47′E / 38.300°N 21.783°E | |
| Country | Greece | 
| Administrative region | Western Greece | 
| Regional unit | Achaea | 
| Municipality | Patras | 
| Area | |
| • Municipal unit | 98.983 km2 (38.218 sq mi) | 
| Elevation | 40 m (130 ft) | 
| Population  (2021) | |
| • Municipal unit | 14,219 | 
| • Municipal unit density | 140/km2 (370/sq mi) | 
| • Community | 5,430 | 
| Time zone | UTC+2 (EET) | 
| • Summer (DST) | UTC+3 (EEST) | 
| Postal code | 265 xx | 
| Area code(s) | 2610 | 
| Vehicle registration | ΑΧ | 
Rio (Greek: Ρίο, Río, formerly Ῥίον, Rhíon; Latin: Rhium) is a town in the suburbs of Patras and a former municipality in Achaea, Western Greece, Greece. Since the 2011 local government reform it is part of the municipality Patras, of which it is a municipal unit. The municipal unit has an area of 98.983 km2. The municipal unit had a population of 14,219 in 2021. The campus of the University of Patras and the Casino Rio is located in Rio.