World Population Day 2025, Theme, Largest Density, List of Top 10 Population Countries

World Population Day 2025 will be observed on July 11 to raise awareness about global population issues. It will highlight youth empowerment, top 10 populous countries, and regions with the highest population density.

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July 04, 2025

World Population Day 2025, Theme, Largest Density, List of Top 10 Population Countries

World Population Day is observed every year on July 11 to raise awareness about population-related challenges and their implications on development, the environment, and human rights. It was established in 1989 by the United Nations Development Programme (UNDP) following the global attention generated by Five Billion Day on July 11, 1987 — the day when the world population crossed the five billion mark.

This observance is a call to action for governments, institutions, and individuals to understand the impact of a growing population and the importance of ensuring equitable access to reproductive health services, education, and resources for sustainable development.

Also Read: List Of International National Days 2025 Month-Wise List

World Population Day 2025

World Population Day is a globally recognised event established in 1989 by the United Nations Development Programme (UNDP). The day was inspired by the public interest surrounding “Five Billion Day”, celebrated on July 11, 1987, when the world’s population reached five billion.

Since then, World Population Day has evolved into a platform for advocacy on vital population-related issues such as family planning, gender equality, maternal health, and sustainable development.

World Population Day 2025 Overview
Particulars Details
Name of the Observance World Population Day 2025
Date 11th July 2025
Established By United Nations Development Programme (UNDP)
First Observed 11th July 1989
Inspired By Five Billion Day (11th July 1987)
World Population Day 2025 Theme “Empowering young people to create the families they want in a fair and hopeful world.”
Purpose Raise awareness about population issues, reproductive health, and gender equality
Associated Goals SDG 3: Good Health and Well-being, SDG 5: Gender Equality
Focus Area in 2025 Youth empowerment, reproductive agency, access to healthcare and family planning
Global Population (Estimated) Over 8.1 Billion
India’s Population Rank 1st (Most Populous Country in 2025)
Celebrated By United Nations, governments, NGOs, academic institutions, and individuals

World Population Day 2025 focuses on empowering young people to shape their futures by ensuring access to reproductive rights, healthcare, and equal opportunities. As global population trends shift, this year’s observance urges stakeholders to prioritise youth-centric policies that reflect fairness, inclusivity, and sustainability.

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Objectives of World Population Day 2025

The main goals of World Population Day 2025 include:

  • Raising awareness about the growing global population and its impact.
  • Promoting reproductive health and rights, especially for women and youth.
  • Advocating gender equality and empowering women to make informed family choices.
  • Aligning with Sustainable Development Goals (SDGs) like:

    • SDG 3: Good Health and Well-being.
    • SDG 5: Gender Equality.

Also Read: Important Days in July 2025

World Population Day 2025 Theme

The World Population Day 2025 theme is “Empowering young people to create the families they want in a fair and hopeful world.” This year’s theme highlights the largest-ever generation of youth and their right to make informed choices about their future families. 

Many young individuals globally face challenges such as economic instability, limited access to education, and healthcare barriers that affect their reproductive autonomy. The 2025 campaign urges policymakers to prioritise the aspirations and rights of young people.

World Population Trends 2025 and Beyond

The world has witnessed explosive population growth in recent decades. From 1 billion people in the 1800s, we reached:

  • 7 billion in 2011
  • Almost 8.1 billion in 2025
  • Expected to reach 8.5 billion by 2030 and 9.7 billion by 2050

Urbanisation and Migration

Since 2007, more people have lived in urban areas than in rural ones. By 2050, about 66% of the global population will reside in cities.

Fertility & Reproductive Shifts

  • Global fertility rate fell from 4.5 children/woman (1970s) to below 2.5 in 2015
  • Global average childbearing age is now 28 years
  • Nearly 20% of adults worry they cannot have their desired number of children

World’s Largest Populations in 2025

As of 2025, the global population has surpassed 8.1 billion people. Some countries continue to contribute significantly to this growth, both in sheer numbers and annual change. Understanding which nations have the largest populations helps policymakers, economists, and development planners to design effective public policies, infrastructure, and resource management systems.

Here are the top 10 countries by population in 2025, according to the latest UN estimates:

World’s Largest Populations in 2025
Rank Country Population (2025)
1 India 1,463,865,525
2 China 1,416,096,094
3 United States 347,275,807
4 Indonesia 285,721,236
5 Pakistan 255,219,554
6 Nigeria 237,527,782
7 Brazil 212,812,405
8 Bangladesh 175,686,899
9 Russia 143,997,393
10 Ethiopia 135,472,051

India now tops the list, having surpassed China as the most populous country. This demographic milestone is at the heart of discussions on World Population Day 2025, especially when it comes to youth empowerment and resource sustainability.

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World’s Largest Population Density Countries (2025)

Understanding population density is key to analysing how human settlement impacts resources and urban infrastructure. It tells us how crowded a country is, which directly affects healthcare, housing, transport, and environmental sustainability. 

On World Population Day 2025, population density metrics are vital to understanding global demographic pressure. Here are the top 5 most densely populated countries/territories in 2025 (by people per square kilometer):

World’s Largest Population Density Countries (2025)
Rank Country/Territory Density (people/km²)
1 Macau 21,946
2 Monaco 19,171
3 Singapore 8,177
4 Hong Kong 7,044
5 Gibraltar 5,901

The world largest population density country in 2025 is Macau, with a staggering 21,946 people per square kilometer

Top 10 Population States in India According to 2011 Census

To understand the historical growth of India’s population, it’s essential to look back at official statistics. The 2011 Census, conducted by the Government of India, provides detailed data on state-wise population distribution, rural-urban divide, and gender composition. On World Population Day, this retrospective view helps policymakers and researchers evaluate demographic trends over time.

Below is a table listing the top 10 most populous states in India based on the Census 2011:

Top 10 Most Populous States in India (Census 2011)
Rank State Population Male Population Female Population Rural Population Urban Population
1 Uttar Pradesh 199,812,341 104,480,510 95,331,831 155,317,278 44,495,063
2 Maharashtra 112,374,333 58,243,056 54,131,277 61,556,074 50,818,259
3 Bihar 104,099,452 54,278,157 49,821,295 92,341,436 11,758,016
4 West Bengal 91,276,115 46,809,027 44,467,088 62,183,113 29,093,002
5 Madhya Pradesh 72,626,809 37,612,306 35,014,503 52,557,404 20,069,405
6 Tamil Nadu 72,147,030 36,137,975 36,009,055 37,229,590 34,917,440
7 Rajasthan 68,548,437 35,550,997 32,997,440 51,500,352 17,048,085
8 Karnataka 61,095,297 30,966,657 30,128,640 37,469,335 23,625,962
9 Gujarat 60,439,692 31,491,260 28,948,432 34,694,609 25,745,083
10 Andhra Pradesh 84,580,777* 42,442,146 42,138,631 56,361,702 28,219,075

*Note: Andhra Pradesh’s population in 2011 includes the undivided state (prior to the formation of Telangana in 2014).

Highest and Lowest Population States in India

On World Population Day, looking at extremes within a country like India helps contextualise inequality in resource distribution and policy reach. While some regions are highly dense, others remain sparsely populated.

  • Highest Population State in India (2025): Uttar Pradesh – with 241 million people, this state alone houses more people than Nigeria, the 6th most populous country in the world.
  • Lowest Population State in India (2025): Sikkim – with an estimated 703,000 residents, this Himalayan state is the least populated.

This disparity signifies the need for decentralised planning and localised development, which remains a key message of World Population Day 2025.

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Why World Population Day 2025 Matters

This year, World Population Day 2025 emphasises empowering young people to build the families they want amid growing challenges such as climate anxiety, economic stress, and gender inequality. Despite declining fertility rates globally, millions still lack reproductive autonomy, especially women and adolescents in developing nations.

According to the UNFPA, many young people desire more children than they are able to have due to:

  • Rising cost of living
  • Inaccessible reproductive services
  • Climate-related fears
  • Unstable socio-political environments

These issues can only be addressed by prioritising reproductive rights, improving health systems, and ensuring inclusive education, cornerstones of this year’s World Population Day 2025 theme.

Conclusion

World Population Day is not just about numbers—it’s about people. As we mark World Population Day 2025, the focus must remain on empowering the current generation, especially youth, to create a future that reflects their hopes and choices. By acknowledging both the opportunities and challenges of demographic shifts, the global community can move toward a more equitable, resilient, and sustainable world.

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World Population Day FAQs

World Population Day is observed on July 11 to raise awareness about global population issues and their impact on health, rights, and development.

The World Population Day 2025 theme is “Empowering young people to create the families they want in a fair and hopeful world.”

Macau has the world's largest population density in 2025, with over 21,900 people per km², followed by Monaco and Singapore.

The top 10 population countries include India, China, USA, Indonesia, Pakistan, Nigeria, Brazil, Bangladesh, Russia, and Ethiopia.

Uttar Pradesh is the highest population state in India, with over 241 million people, making up around 17% of India’s total population.

Sikkim is the lowest population state in India with an estimated population of around 703,000 in 2025.

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