India is the most populous country in the world with one-sixth of the world's population. According to UN estimates, India overtook China in having the largest population in the world with a population of 1,425,775,850 at the end of April 2023.
Population is the term typically used to refer to the number of people in a single area. Governments conduct a census to quantify the size of a resident population within a given jurisdiction. The term is also applied to non-human animals, microorganisms, and plants, and has specific uses within such fields as ecology and genetics.
Demographic features of the population of Vietnam include population density, ethnicity, education level, health of the populace, economic status, religious affiliations and other aspects of the population.
The United Nations Population Fund (UNFPA), formerly the United Nations Fund for Population Activities, is a UN agency aimed at improving reproductive and maternal health worldwide. Its work includes developing national healthcare strategies and protocols, increasing access to birth control, and leading campaigns against child marriage, gender-based violence, obstetric fistula, and female genital mutilation.
Family planning is the consideration of the number of children a person wishes to have, including the choice to have no children, and the age at which they wish to have them. Things that may play a role on family planning decisions include marital situation, career or work considerations, financial situations. If sexually active, family planning may involve the use of contraception and other techniques to control the timing of reproduction.
Women's health differs from that of men's health in many unique ways. Women's health is an example of population health, where health is defined by the World Health Organisation as "a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity". Often treated as simply women's reproductive health, many groups argue for a broader definition pertaining to the overall health of women, better expressed as "The health of women". These differences are further exacerbated in developing countries where women, whose health includes both their risks and experiences, are further disadvantaged.
Population growth is the increase in the number of people in a population or dispersed group. Actual global human population growth amounts to around 83 million annually, or 1.1% per year. The global population has grown from 1 billion in 1800 to 7.9 billion in 2020. The UN projected population to keep growing, and estimates have put the total population at 8.6 billion by mid-2030, 9.8 billion by mid-2050 and 11.2 billion by 2100. However, some academics outside the UN have increasingly developed human population models that account for additional downward pressures on population growth; in such a scenario population would peak before 2100. Others have challenged many recent population projections as having underestimated population growth.
Human overpopulation describes a concern that human populations may become too large to be sustained by their environment or resources in the long term. The topic is usually discussed in the context of world population, though it may concern individual nations, regions, and cities.
World Population Day is an annual event, observed on July 11 every year, which seeks to raise awareness of global population issues. The event was established by the Governing Council of the United Nations Development Programme in 1989. It was inspired by the public interest in Five Billion Day on July 11, 1987, the approximate date on which the world's population reached five billion people. World Population Day aims to increase people's awareness on various population issues such as the importance of family planning, gender equality, poverty, maternal health and human rights.
The United Nations Population Fund designated 12 October 1999, as the approximate day on which world population reached six billion following the birth of Adnan Mević, the first son of Fatima Helać and Jasminko Mević, in Sarajevo, Bosnia and Herzegovina. It was officially designated The Day of Six Billion.
This article lists current estimates of the world population in history. In summary, estimates for the progression of world population since the Late Middle Ages are in the following ranges:
The Trillion Tree Campaign is a project which aims to plant one trillion trees worldwide. It seeks to repopulate the world's trees and combat climate change as a nature-based solution. The project was launched at PlantAhead 2018 in Monaco by Plant-for-the-Planet. In the fall of 2018, the project's official website was published in order to register, monitor, and donate trees to reforestation projects around the world. The campaign is a continuation of the activities of the earlier Billion Tree Campaign, instigated by Wangari Maathai, who founded the Green Belt Movement in Africa in 1977.
International Day of Zero Tolerance for Female Genital Mutilation is a United Nations-sponsored annual awareness day that takes place on February 6 as part of the UN's efforts to eradicate female genital mutilation. It was first introduced in 2003.
In world demographics, the world population is the total number of humans currently living. It was estimated by the United Nations to have exceeded eight billion in mid-November 2022. It took around 300,000 years of human prehistory and history for the human population to reach a billion and only 222 years more to reach 8 billion.
7 Billion Actions is a worldwide campaign established by the United Nations Population Fund (UNFPA) in 2011 to commemorate the world population milestone of 7 billion people. UNFPA is a United Nations organization that works on population and development issues, with an emphasis on reproductive health and gender equality. 7 Billion Actions works with multiple corporations, organizations and individuals to address the 7 Key Issues such as poverty, gender equality, youth, ageing, urbanization, environment, and reproductive health and rights. The UN has declared the World Population surpassing 7 billion on 31 October 2011. Prior to this date, the UN celebrated the Day of Six Billion in October 1999.
Earth has a human population of over 8 billion as of 2024, with an overall population density of 50 people per km2. Nearly 60% of the world's population lives in Asia, with almost 2.8 billion in the countries of China and India combined. The percentage shares of China, India and rest of South Asia of the world population have remained at similar levels for the last few thousand years of recorded history. The world's literacy rate has increased dramatically in the last 40 years, from 66.7% in 1979 to 86.3% today. Lower literacy levels are mostly attributable to poverty. Lower literacy rates are found mostly in South Asia and Sub-Saharan Africa.
Population projections are attempts to show how the human population statistics might change in the future. These projections are an important input to forecasts of the population's impact on this planet and humanity's future well-being. Models of population growth take trends in human development and apply projections into the future. These models use trend-based-assumptions about how populations will respond to economic, social and technological forces to understand how they will affect fertility and mortality, and thus population growth.
World population milestones went unnoticed until the 20th century, since there was no reliable data on global population dynamics.
Since the establishment of the United Nations (UN) in 1945, three official international conferences on population have been held, and two other conferences on population have been convened. This followed the first ever World Population Conference was in Geneva from 29 August to 3 September 1927, organized by the League of Nations and Margaret Sanger.
The Day of Eight Billion, marked on 15 November 2022, was designated by the United Nations as the approximate day when the world population reached eight billion people.
