Chad vs Sri Lanka
Sri Lanka has 4% more people than Chad: 21,756,000 vs 21,003,705, a gap of 752,295. Chad is growing faster (+3.41% vs −0.73% a year), adding about 716,671 people a year against −159,415. Using continuous exponential growth from the stated base year, if these rates held, Chad would overtake Sri Lanka in about 1 years (from the 2025 population bases, around 2026) — a projection, not a forecast. Sri Lanka is the older society: 12.5% aged 65+ against 2.1% in Chad, while Chad has more children (46.0% under 15 vs 21.7%). Sri Lanka is 23.2× as densely populated (356.2 vs 15.3 people per km²). People in Sri Lanka live 22.4 years longer on average (77.7 vs 55.2). GDP per capita is 4.9× higher in Sri Lanka ($5,002 vs $1,022).
Country/territory population bases: World Bank 2025 (Chad) and 2025 (Sri Lanka); growth years 2025 / 2025. Annual source values, not live counts; years may differ. Growth is national, not local.
Chad vs Sri Lanka — side by side
 Chad |  Sri Lanka | |
|---|---|---|
| Population | 21,003,7052025 | 21,756,0002025 |
| Growth rate / yr | +3.41%2025 | −0.73%2025 |
| Births per 1,000 | 43.32024 | 10.12024 |
| Deaths per 1,000 | 11.12024 | 7.82024 |
| Children per woman | 6.032024 | 1.952024 |
| Life expectancy | 55.2 yrs2024 | 77.7 yrs2024 |
| Aged 0–14 | 46.0%2025 | 21.7%2025 |
| Aged 65+ | 2.1%2025 | 12.5%2025 |
| Density | 15.3 /km²2023 | 356.2 /km²2023 |
| Area | 1,284,000 km²2023 | 65,610 km²2023 |
| Urban population | 27.6%2025 | 20.5%2025 |
| Net migration / yr | -123,1042025 | -30,7242025 |
| GDP per capita | $1,0222025 | $5,0022025 |
| Country population rank (available records) | #63 | #62 |
| Base / world population (World Bank 2025) | 0.26% | 0.26% |
Highlighted cell = the higher value (not "better"). Small print under each value is its own data year. Source: World Bank; country/territory population bases may have different years. These are not live counts.
Population since 1960
World Bank population history (not the separate UN WPP timeline). Chad: 6.9× from 1960 to 2025; Sri Lanka: 2.3× from 1960 to 2025. Left: absolute population. Right: each series indexed to its own first available year = 100; baseline years may differ.
More comparisons
Regions: Sub-Saharan Africa · South Asia · rankings
Chad: Chad vs Malawi, Chad vs Zambia, Chad vs Sri Lanka, Chad vs Kazakhstan, Chad vs Chile, Chad vs Somalia.
Sri Lanka: Sri Lanka vs India, Sri Lanka vs Bangladesh, Sri Lanka vs Nepal, Sri Lanka vs Burkina Faso, Sri Lanka vs Malawi, Sri Lanka vs Zambia, Sri Lanka vs Chad, Sri Lanka vs Kazakhstan.
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