Experts Warn Population Growth Could Slow Despite India Remaining the World's Most Populous Nation

New Delhi: Billionaire entrepreneur and SpaceX CEO Elon Musk has drawn attention to India's declining fertility rate, stating that the country's birth rate has fallen below the replacement level needed to sustain long-term population growth.

Musk shared his observations on social media platform X, citing recent demographic data that indicates a significant decline in India's fertility rate over the past decade. His comments have reignited discussions about population trends, economic development, workforce dynamics, and the long-term implications of demographic change in the world's most populous country.

Elon Musk Raises Concerns Over India's Birth Rate

In a post on X, Musk noted that India's birth rate has already fallen below the replacement threshold and highlighted that fertility rates among highly educated groups had dropped below replacement levels several years ago.

His remarks were based on demographic data showing that India's Total Fertility Rate (TFR) has declined from approximately 2.3 births per woman to 1.9 births per woman within a decade.

A fertility rate of 2.1 births per woman is generally considered the replacement level required to maintain a stable population over generations without migration.

The decline below this threshold suggests that, over time, fewer children are being born than are needed to replace the existing population.

What Does a Fertility Rate Below Replacement Level Mean?

Demographers use the Total Fertility Rate to estimate the average number of children a woman is expected to have during her lifetime.

When the fertility rate falls below the replacement level of 2.1, a country may eventually experience:

While population decline does not occur immediately, sustained low fertility rates can significantly alter a nation's demographic structure over the long term.

India's Population Continues to Grow

Despite the decline in fertility rates, India remains the world's most populous country.

According to recent estimates, India's population has surpassed 1.46 billion people, overtaking China in 2023 to become the largest population globally.

Experts note that population growth continues due to demographic momentum, as a large proportion of India's population remains relatively young and within childbearing age.

However, if fertility rates remain below replacement levels for an extended period, population growth could eventually slow and potentially reverse in future decades.

UNFPA Report Highlights Demographic Transition

The United Nations Population Fund (UNFPA), in its 2025 State of World Population Report, reported that India's fertility rate has declined to 1.9 births per woman, confirming that the country has entered a new phase of demographic transition.

According to the report, the decline reflects significant social and economic changes, including:

These factors have contributed to smaller family sizes across many parts of the country.

Regional Differences in Fertility Rates

Experts emphasize that fertility rates vary considerably across India.

Major metropolitan regions and economically developed states have witnessed some of the sharpest declines.

Reports indicate that Delhi's fertility rate has fallen to approximately 1.2 births per woman, placing it among the lowest fertility regions globally and even below several developed countries.

In contrast, some states continue to record fertility rates closer to or above the replacement level, reflecting India's diverse demographic landscape.

Challenges Beyond Population Growth

While declining fertility rates are often associated with economic development, international organizations continue to highlight challenges that require attention.

According to UNFPA, issues such as maternal mortality, gender inequality, early marriage, and adolescent pregnancies remain concerns in several regions of India.

The organization notes that despite substantial improvements in education, healthcare, and living standards, disparities persist across different social and economic groups.

Addressing these challenges remains critical to ensuring sustainable and inclusive development.

Global Trend of Declining Birth Rates

India is not alone in experiencing falling fertility rates.

Many countries across Asia, Europe, and North America have witnessed similar demographic trends in recent decades.

Nations such as Japan, South Korea, China, Italy, and Germany have all faced challenges associated with declining birth rates and ageing populations.

These countries have increasingly focused on policies aimed at supporting families, encouraging workforce participation, and adapting economic systems to changing demographic realities.

What the Future Could Hold for India

Experts believe India's demographic transition presents both opportunities and challenges.

A large working-age population continues to provide significant economic advantages, often referred to as the "demographic dividend." However, long-term planning will be necessary to address the potential consequences of lower fertility rates.

Policymakers may need to focus on:

As India continues its economic rise, demographic trends will play an increasingly important role in shaping the country's future growth trajectory.

Elon Musk's remarks have once again highlighted the global conversation around population trends, underscoring how demographic shifts are becoming a key factor influencing economic and social policy worldwide.

(With inputs from agencies)