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Sierra Leone Summary

Population 2000 (NSO-Based Estimate '000) 4,575   Population 2000 (UN '000) 4,405
Area (km2) 72,616   Avg. Input Resolution (km) 22
Number of Administrative Units 147   Population Per Administrative Unit ('000) 31
Number of Urban Extents 24   Number of Settlement Points 76

Sierra Leone Details

Continent Africa
Country Name Sierra Leone
Administrative Classifications
Level Used 3.0
Leve1 Type Province
Level2 Type District
Level3 Type Chiefdom/Ward
Number of Units 147
Population Per Unit ('000) (2000, estimate) 31
National Population Estimates
Last Year of Reference 2004
NSO-Based Estimated Population, 1990 ('000) 3,786
NSO-Based Estimated Population, 1995 ('000) 4,117
NSO-Based Estimated Population, 2000 ('000) 4,575
UN Population, 1990 ('000) 4,061
UN Population, 1995 ('000) 4,080
UN Population, 2000 ('000) 4,405
National Spatial Estimates
Area (km2) 72,616
Average Input Resolution (km) 22
Settlement Points
Number of Settlement Points 76
Largest Settlement, by Population (2000, estimate) 813,694
Smallest Settlement, by Population (2000, estimate) 1,085
Mean Settlement, by Population (2000, estimate) 24,011
Urban Areal Extents
Number of Urban Extents 24
Largest Urban Extent (km2) 91
Smallest Urban Extent (km2) 14
Mean Urban Extent (km2) 30
Total for All Urban Extent (km2) 712
Largest Urban Extent (population, 2000) 763,194
Smallest Urban Extent (population, 2000) 6,139
Mean Urban Extent (population, 2000) 53,060
Total for All Urban Extent (population, 2000) 1,273,438
% Total Land Area in Urban Extents (km2) 1%
% Total Population in Urban Extents (2000, estimate) 28%
% Total Population that is Urban (2001, UN World Urbanization Prospects) 37%
Urban Areal Extents, by Source
Nighttime Lights Data 6
Regression-estimated Extents 54
Digital Chart of the World 0
Other 0
Administrative Population Source Data:
The 1985 and 2004 census population data were provided by Statistics Sierra Leone. For the 2004 population data, see: Provisional Results, 2004 Population and Housing Census, For the 1985 population data, see: Preliminary Report on the 1985 National Population Census:
Administrative Boundary Source Data:
Prepared for the Government of Sierra Leone Ministry of Agriculture, Forestry and Marine Resources, funded by the European Union through the National Authorising Office; See also:
Settlement Point Population Source Data:
AFCities, Data provided by Uwe Deichman at the World Bank; Handbook of the Population of Sierra Leone, UN Statistical Library
Settlement Point Coordinate Source Data:
AFCities, Columbia Gazetteer, NIMA, Times Atlas of the World, 1, World Gazetteer
Urban Criteria for Settlements (UN):
Towns with 5,000 inhabitants or more.
Administrative Population Edits and Notes:
Four units were missing from the shapefile. Their population was reassigned as follows: Dibia to Tinkatupa Maki Saffoko / Port Loko / Northern, Gbense to Kamara / Kono / Eastern, Panga Kim to Panga-Kabonde / Pujehun / Southern, Sowa to Panga-Kabonde / Pujehun / Southern). In Port Loko, after the 1985 census, the unit Marampa-Masimera was separated into Maramapa and Marimera. Thus, the 1985 population for Marampa Marimera was redistributed to Maramapa and Marimera according to the proportions from the 2004 census. Also, a 5% rate cap was applied to select units when extrapolating population figures to target years (using 1985-2004 growth rate).
Administrative Spatial Edits and Notes: