| Type: | parish |
| Official Name: | Rio Tinto |
| Region: | Norte |
| Metro: | Porto |
| District: | Porto |
| Municipality: | Gondomar |
| Coordinates: | 41.178°N -8.56°W |
| Area Total: | 9.38 |
| Population As Of: | 2011 |
| Population Total: | 50713 |
| Postal Code: | 4435 |
| Website: | http://www.jf-riotinto.pt/ |
Rio Tinto (pronounced as /pt/) is a Portuguese city and parish, located in Gondomar Municipality, in northern Portugal. The population in 2011 was 50,713,[1] in an area of 9.38 km2.[2] Rio Tinto, which in Portuguese means red river, was elevated to city status in 1995, and the city of Rio Tinto includes two parishes (freguesias): Baguim do Monte and Rio Tinto, with a total of 65,000 inhabitants, being the most populous city in Gondomar municipality, and third largest in the Greater Porto agglomeration.Rio Tinto lies just outside the city of Porto.