Population Growth in the North Bihar Plain: A Sociological Analysis of Historical Trends and Future Implications

Abstract

This study examines the trends, causes and implications of population growth in the North Bihar plain from a sociological perspective. Drawing on Census data from 1901 to 2011 and applying the Incremental Increase Method for projections up to 2051, the research highlights the region’s demographic trajectory across three distinct phases-marginal growth (1901–1921), moderate growth (1921–1951) and rapid growth (1951–2011). Findings reveal that North Bihar has consistently experienced higher population growth and density than the state and national averages, driven largely by high fertility, early marriage, poverty and declining mortality. Despite recurrent floods and limited infrastructural development, the region’s population expanded from 13.5 million in 1901 to 65.5 million in 2011, with density rising to 1,236 persons per sq. km. Projections suggest slower but sustained growth, with North Bihar expected to reach nearly 98 million by 2051. The ongoing demographic transition, reflected in declining fertility and reduced growth rates, indicates a gradual stabilization. However, persistent challenges such as overpopulation, resource pressure, disaster vulnerability and socio-economic inequalities remain critical concerns. The study underscores the need for integrated policies focusing on education, health, women’s empowerment and sustainable development to balance population dynamics with regional resilience.