Sierra LeoneNigeria
Sierra Leone has a population of 9.1M, compared to Nigeria's 223.8M. Nigeria is 24.7 times more populous than Sierra Leone. Economically, Nigeria ($252.3B) has a GDP 36.2 times larger than Sierra Leone's ($7.0B). Nigeria covers 923,768 km², 12.9 times larger than Sierra Leone's 71,740 km². Life expectancy in Sierra Leone stands at 61.8 years, 7.3 years higher than Nigeria's 54.5 years.
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Metric
Sierra LeoneNigeria| Population | 9.1M | 223.8M |
| Area | 71,740 km² | 923,768 km² |
| GDP | $7.0B | $252.3B |
| GDP Per Capita | $806.655 | $1,084.16 |
| Life Expectancy | 61.8 yrs | 54.5 yrs |
| Infant Mortality | 56.2 | 60.1 |
| Literacy Rate | — | — |
| Unemployment | 3.1% | 3.1% |
| Capital | Freetown | Abuja |
| Region | Africa | Africa |
| Languages | English | English |
| Currencies | SLE (Le) | NGN (₦) |
Last updated: April 2026
All data sourced from World Bank Open Data (2025) and REST Countries API. Economic data may reflect most recent available year.
Population Comparison
Nigeria is 24.7 times more populous than Sierra Leone, with 223.8M residents compared to 9.1M. Sierra Leone is a nation of 9.1M people, while Nigeria is among the world's 15 most populous countries. In terms of population density, Sierra Leone averages 127 people per km² (moderate), while Nigeria averages 242 people per km² (dense). Nigeria has grown at 2.33% annually over the past decade. Population growth data is not available for Sierra Leone.
Economy Comparison
Sierra Leone is classified as a low-income economy, while Nigeria is classified as a low-income economy. The Nigeria economy ($252.3B) is 36.2 times larger than Sierra Leone's ($7.0B). Sierra Leone's GDP per capita of $806.655 is 63% below the regional average of 2,200 for Africa. Nigeria's GDP per capita of $1,084.16 is 51% below the regional average of 2,200 for Africa. On a per-capita basis, residents of Nigeria are on average 1.3 times wealthier than those in Sierra Leone.
Health & Quality of Life
Life expectancy in Sierra Leone is 61.8 years, compared to 54.5 years in Nigeria, a gap of 7.3 years. Sierra Leone (61.8 years) is 10.2 years below the global average of 72 years, while Nigeria (54.5 years) is 17.5 years below the global average of 72 years. At 60.1 deaths per 1,000 live births, Nigeria's infant mortality is 7% higher than Sierra Leone's 56.2.
Geographic Comparison
Nigeria (923,768 km²) is 12.9 times larger by land area than Sierra Leone (71,740 km²). Sierra Leone shares borders with 2 countries, while Nigeria borders 4 countries. Sierra Leone spans 1 timezone, compared to Nigeria's 1 timezone. Both Sierra Leone and Nigeria are located in Africa. Both countries fall within the Africa region, though they occupy different subregions: Western Africa and Western Africa.
Key Differences
The most significant difference between Sierra Leone and Nigeria is in GDP: Sierra Leone's $7.0B compared to Nigeria's $252.3B represents a 97% gap. The most significant difference between Sierra Leone and Nigeria is in population: Sierra Leone's 9.1M compared to Nigeria's 223.8M represents a 96% gap. The most significant difference between Sierra Leone and Nigeria is in land area: Sierra Leone's 71,740 km² compared to Nigeria's 923,768 km² represents a 92% gap. These disparities reflect the broader structural differences between Sierra Leone's low-income economy and Nigeria's low-income economy.
At a Glance: What the Numbers Mean
Living Standards
Nigeria has a GDP per capita of $1,084.16, which is 1.3x that of Sierra Leone ($806.655). This gap reflects differences in economic development, industrial structure, and workforce productivity. In practical terms, average purchasing power in Nigeria is significantly higher, though cost of living differences partially offset the raw income gap.
Population Density
Nigeria is 1.9x more densely populated than Sierra Leone (242 vs 127 people per km²). Higher density typically correlates with more urbanization, greater demand for public transit, and higher housing costs. Sierra Leone's lower density suggests more rural land use and potentially lower urban congestion.
Healthcare and Longevity
Citizens of Sierra Leone live an average of 7.3 years longer than those of Nigeria (61.8 vs 54.5 years). This gap reflects differences in healthcare access, nutrition, public health infrastructure, and environmental factors. This is a substantial gap that suggests significant differences in healthcare systems and overall living conditions.
Economic Momentum
Sierra Leone's economy grew at 4.3% compared to Nigeria's 4.1%. Both countries show healthy growth, though Sierra Leone has a modest edge in economic dynamism.
Travel Comparison
Sierra Leone vs Nigeria for Families
For family travel, Sierra Leone generally edges ahead due to lower infant mortality (56.2 vs 60.1 per 1,000), which is a useful proxy for healthcare infrastructure and child safety. Nigeria offers its own advantages, including more geographic diversity for road trips. Both countries have family-friendly attractions, though Sierra Leone's higher GDP per capita typically correlates with better tourist infrastructure, public transport, and English-language availability.
Sierra Leone vs Nigeria for Budget Travelers
Sierra Leone is typically the more budget-friendly destination, with a GDP per capita of $806.655 translating to lower prices for accommodation, food, and local transport. Budget travelers in Sierra Leone can expect to spend significantly less per day than in Nigeria. However, Nigeria may offer better value in specific categories such as intercity transport or package deals. Shoulder season travel in either country helps reduce costs further.
Sierra Leone vs Nigeria for Retirees
Sierra Leone's life expectancy of 61.8 years suggests stronger healthcare infrastructure, which is a key factor for retirees. Nigeria may offer a lower cost of living, which stretches pension income further. Key considerations for retirees include visa and residency requirements, healthcare access, climate preferences, and proximity to international airports. Both countries have established expat communities, though the specific visa options and healthcare quality vary by region within each country.
Sierra Leone vs Nigeria Cost of Living
Nigeria's GDP per capita is 1.3x that of Sierra Leone, which generally correlates with a higher cost of living. Housing, dining out, and services tend to be more expensive in Nigeria, while Sierra Leone offers more purchasing power per dollar for everyday expenses. However, cost of living varies significantly by city within each country. Major urban centers in Sierra Leone can approach or exceed average costs in Nigeria's smaller cities.
Sierra Leone vs Nigeria for Digital Nomads
For digital nomads choosing between Sierra Leone and Nigeria, key factors include internet infrastructure, visa policies, cost of living, and timezone compatibility with clients. Sierra Leone spans 1 timezone while Nigeria covers 1. Sierra Leone's lower cost of living makes it attractive for stretching remote income. Both countries have growing digital nomad communities, though specific visa requirements for remote workers differ and should be verified before committing to a longer stay.
Frequently Asked Questions
Which is bigger, Sierra Leone or Nigeria by population?
Nigeria is larger by population, with 223.8M residents compared to Sierra Leone's 9.1M. Nigeria is 24.7 times more populous than Sierra Leone.
Which country has a higher GDP, Sierra Leone or Nigeria?
Nigeria has the higher GDP at $252.3B, compared to Sierra Leone's $7.0B. Nigeria's economy is 36.2 times larger.
How does life expectancy compare between Sierra Leone and Nigeria?
Sierra Leone has a higher life expectancy at 61.8 years, compared to Nigeria's 54.5 years. The gap between the two countries is 7.3 years. Sierra Leone's life expectancy is 10.2 years below the global average of 72 years, while Nigeria's is 17.5 years below the global average of 72 years.
Which country is larger by area, Sierra Leone or Nigeria?
Nigeria is larger by land area, covering 923,768 km² compared to Sierra Leone's 71,740 km². Nigeria is 12.9 times larger than Sierra Leone.
What languages are spoken in Sierra Leone and Nigeria?
Sierra Leone recognizes the following official language: English. Nigeria recognizes: English. Both countries share at least one common language.
Which country has lower inflation, Sierra Leone or Nigeria?
Sierra Leone has lower inflation at 28.6%, compared to Nigeria's 33.2%. Sierra Leone's inflation is severely elevated at 28.6%, a rate that erodes household purchasing power, while Nigeria's rate is severely elevated at 33.2%, a rate that erodes household purchasing power.
Is Sierra Leone or Nigeria better for a family holiday?
For family travel, Sierra Leone generally edges ahead due to lower infant mortality (56.2 vs 60.1 per 1,000), which is a useful proxy for healthcare infrastructure and child safety. Nigeria offers its own advantages, including more geographic diversity for road trips. Both countries have family-frie...
Is Sierra Leone or Nigeria cheaper to visit?
Sierra Leone is typically the more budget-friendly destination, with a GDP per capita of $806.655 translating to lower prices for accommodation, food, and local transport. Budget travelers in Sierra Leone can expect to spend significantly less per day than in Nigeria. However, Nigeria may offer bett...
Is Sierra Leone or Nigeria better for retirement?
Sierra Leone's life expectancy of 61.8 years suggests stronger healthcare infrastructure, which is a key factor for retirees. Nigeria may offer a lower cost of living, which stretches pension income further. Key considerations for retirees include visa and residency requirements, healthcare access, ...
Is Sierra Leone or Nigeria more expensive to live in?
Nigeria's GDP per capita is 1.3x that of Sierra Leone, which generally correlates with a higher cost of living. Housing, dining out, and services tend to be more expensive in Nigeria, while Sierra Leone offers more purchasing power per dollar for everyday expenses. However, cost of living varies sig...
Is Sierra Leone or Nigeria better for digital nomads?
For digital nomads choosing between Sierra Leone and Nigeria, key factors include internet infrastructure, visa policies, cost of living, and timezone compatibility with clients. Sierra Leone spans 1 timezone while Nigeria covers 1. Sierra Leone's lower cost of living makes it attractive for stretch...