Sierra Leone

Sierra Leone sits on the west coast of Africa, bordered by Guinea to the northeast, Liberia to the southeast, and the Atlantic Ocean to the southwest and west. In international statistical classification, it is assigned UN M49 code 694, ISO alpha-2 code SL, and ISO alpha-3 code SLE. The United Nations groups it under the region of Africa and the subregion of Sub-Saharan Africa, and it is a UN member state. The World Bank lists Freetown as the capital city. These identifiers are administrative and statistical conventions maintained by the UN Statistics Division (UNSD); they are not political or territorial claims.

What follows gives you the stable identifiers for Sierra Leone and a method for verifying current data yourself. Volatile data, population counts, currency values, government composition, and visa rules, change frequently and should be checked against the named source for the year you are researching.

Classification facts

Sierra Leone is classified by the United Nations with M49 code 694. Its ISO alpha-2 code is SL; ISO alpha-3 code is SLE. The UN places the nation in the Africa region, Sub-Saharan Africa subregion, and lists it as a UN member state. The World Bank capital field lists Freetown. These identifiers are statistical and administrative labels, not political or territorial claims. The UN M49 overview explains how countries are classified; it does not publish population counts.

Country basics

Freetown is the capital and largest city. The nation sits on the West African coast, bordering the North Atlantic Ocean, with Guinea to the north and northeast and Liberia to the southeast. It has a tropical climate, a coastline, and a largely hilly interior rising to the Loma Mountains. Political and administrative functions are concentrated in Freetown, but the country also has a district structure that includes both urban and rural councils. For territorial or administrative subdivisions, use the Statistics Sierra Leone (SSL) rather than secondary compilations.

Capital

Freetown is the capital, located on the Freetown Peninsula along the Atlantic coast. It is also the largest city and main economic hub. The World Bank country profile lists Freetown as the capital.

Population and demographics

Population estimates change frequently and are projections, not exact counts. The UN World Population Prospects publishes annual estimates; the World Bank and national statistical offices also publish their own series, and the numbers differ because they use different base data and projection methods. For Sierra Leone, the World Bank country page provides the latest annual estimate, typically drawn from the UN World Population Prospects or national censuses. Always check the reference year next to the figure you cite. The most recent census was conducted in 2015; the next census may revise published counts substantially, especially for rural areas and informal settlements.

How to source current population data

For a single comparable number, use the United Nations estimate, and always note the reference year. The World Bank API returns country metadata and lets you pull indicators like total population (SP.POP.TOTL) for Sierra Leone. The World Bank names its reference year in the dataset; do not treat the figure as “today’s population.”

Census data is typically collected every 10 years in Sierra Leone; the most recent census was the 2015 Population and Housing Census, conducted by Statistics Sierra Leone (SSL). Between censuses, published numbers are projections. Cross-check the UN World Population Prospects for the same reference year if you need a second source. Because census results are typically published one to two years after fieldwork, always check whether the figure you are citing is a census count or an inter-censal projection. For cross-country comparison, use the UN World Population Prospects estimates rather than mixing national census counts with international projections. The next national census is planned for December 2025.

Languages

The official language of Sierra Leone is English, used in government, education, and formal media. Krio, an English-based creole, serves as the most widely spoken lingua franca across ethnic groups. The nation is multilingual; major languages include Mende (spoken mainly in the south and east) and Temne (spoken mainly in the north and central areas), alongside numerous smaller languages. Speaker numbers change with each census and survey, so the national statistical office and UNESCO reports are the sources to cite for current estimates.

Official and national languages

English is the language of government and formal education. Krio functions as the most widely spoken lingua franca. The country also recognizes several indigenous languages, including Mende, Temne, and others, but the official status of each may differ depending on the source and the level of government (national vs. local). Language data is rarely collected in censuses with consistent methodology; the most recent census data should be cited with its reference year.

Currency and economy

The currency is the Sierra Leonean leone (SLE, ISO 4217 code SLE; the old SLL was redenominated in 2022, with 1 new leone equal to 1,000 old leones). Exchange rates and inflation change frequently; do not rely on a static number. For current economic indicators, use the World Bank country API or the national statistics office. For amounts, use the Bank of Sierra Leone’s published rate, not a news article or a travel forum.

Economic indicators

GDP figures are reported in both nominal US dollars and purchasing power parity (PPP) international dollars, and the two numbers answer different questions. The World Bank income classification for Sierra Leone is updated annually and can be checked directly on the World Bank country overview page. The IMF publishes projections of GDP growth and inflation; always cite the specific report year and edition.

Government and political context

Sierra Leone is a republic with a president as head of state and head of government. The country held national elections in 2023; the electoral process and its outcome were observed by international missions, and political conditions should be verified against primary sources. For the official structure, see the Government of Sierra Leone’s own publications and the U.S. State Department country page for background. Territorial and administrative divisions are a matter of national law; the UN M49 classification groups Sierra Leone under Africa and Sub-Saharan Africa for statistical purposes only and makes no political claim.

People, language and culture

Population counts change between censuses. The most recent national census and its release date are reported by Statistics Sierra Leone (Stats SL). For a stable cross-country comparison, use the UN World Population Prospects, which publishes annual estimates with a stated reference date. Do not mix a census count with a projection; the census is the actual count, while projections are modeled estimates between censuses.