Sierra Leone (officially the Republic of Sierra Leone), is a country in West Africa. It is bordered by Guinea in the north-east, Liberia in the south-east, and the Atlantic Ocean in the south-west. Sierra Leone has a tropical climate, with a diverse environment ranging from savannah to rainforests.
Sierra Leone has a total area of 71,740 km2 and an estimated population of 6 million (2011 United Nations estimate). Freetown is the capital, largest city, and its economic and political centre. Bo is the second largest city and second major economic centre in the country. The country is divided into four geographical regions: the Northern Province, Eastern Province, Southern Province and the Western Area, which are further divided into fourteen districts.