Finland, officially the Republic of Finland, is a Nordic country located in Northern Europe. Finland shares land borders with Sweden to the west, Russia to the east, and Norway to the north and is defined by the Gulf of Bothnia to the west and the Gulf of Finland to the south that are part of the Baltic Sea. Finland has a population of approximately 5.5 million, making it the 25th-most populous country in Europe. With an area of 338,455 square kilometres (130,678 sq mi), Finland is the eighth-largest country in Europe, and the most sparsely populated country in the European Union. Helsinki, the capital of Finland, is the largest city in the country.