Porvoo is a city in Finland. It is located on the south coast of the country, on the Gulf of Finland. Porvoo lies in the eastern part of the Uusimaa region. The population of Porvoo is approximately 52,000, while the sub-region has a population of approximately 60,000. It is the 19th most populous municipality in Finland, and the 15th most populous urban area in the country.