Puerto Viejo is a district of the Sarapiquí canton, in the Heredia province of Costa Rica.

Its head, a small city with the same name, is Puerto Viejo de Sarapiquí, located 82 km north of the city of Heredia and 86 km from San Jose, the capital of the country, near the point of convergence of the Sarapiquí and Puerto Viejo rivers.

[6] The district includes the following population centers: The district is covered by the following road routes: The main sources of income in the area are agriculture (pineapple, banana, sugar cane and cattle) and tourism.

Puerto Viejo has several banks, supermarkets, a clinic and a number of small family businesses ranging from bakeries to beauty salons to cybercafés.

The natural environment and biodiversity of the area, located in the Caribbean lowlands, make it a destination for ecotourists and birdwatchers.