Limón, also known as Puerto Limón, is the capital city of both the province and canton of the same name. One of Costa Rica's seven "middle citi…Limón, also known as Puerto Limón, is the capital city of both the province and canton of the same name. One of Costa Rica's seven "middle cities", Limón has a population of 71,514, which made it, as of 2022, the most-populous city in the country outside of the Greater Metropolitan Area and the second most-populous district in the nation.