South Asia (IDA & IBRD) Population 2026
As of 2025, the population of the World Bank aggregate region South Asia (IDA & IBRD) stands at 1,677,384,532. This region encompasses a diverse group of nations and territories in southern Asia, including both IDA-eligible and IBRD-eligible countries. The latest data reflects a 1-year growth rate of 0.89% and a 10-year average growth of 0.99%.
Population Trend
Overview
South Asia (IDA & IBRD) represents one of the most densely populated and demographically significant regions in the world, with a population exceeding 1.677 billion in 2025. The region's 1-year growth rate of 0.89% signals a moderate pace of expansion, while the 10-year average growth of 0.99% indicates a gradual slowdown in population increase over the past decade. This trend aligns with broader patterns of demographic transition observed across many developing economies, where improvements in healthcare and education often accompany declining fertility rates.
The region's population dynamics are shaped by its composition of countries that receive support from both the International Development Association (IDA) and the International Bank for Reconstruction and Development (IBRD). These nations face common challenges such as urbanization, infrastructure demands, and employment generation, but also benefit from economic growth and policy initiatives. The moderate growth rate suggests a shift toward lower fertility in some areas, while other subregions may still experience higher birth rates due to varying stages of development.
Comparing the 1-year and 10-year average growth rates reveals a slight recent decline in growth momentum—from 0.99% to 0.89%—which could indicate the initial impacts of demographic changes such as aging populations or family planning programs. However, given the large base population, even modest percentage growth translates to significant absolute increases, requiring sustained investment in social services, housing, and employment.
The region's demographic profile is especially relevant for global population trends, as it accounts for a substantial share of the world's inhabitants. The data provided—1,677,384,532 people in 2025—serves as a baseline for tracking future changes, including the effects of migration, economic development, and public health outcomes. Understanding these figures helps policymakers and researchers assess resource allocation and development priorities.