The United Nations population estimates and projections form a comprehensive set of demographic data to assess population trends at the global, regional and national levels. They are used in the calculation of many of the key development indicators commonly used by the United Nations system, including for more than one third of the indicators used to monitor progress towards the achievement of the Sustainable Development Goals. The 2019 revision of the World Population Prospects is the twenty-sixth edition of the official United Nations population estimates and projections, which have been prepared since 1951 by the Population Division of the Department of Economic and Social Affairs. The 2019 revision presents population estimates from 1950 until the present for 235 countries or areas, which have been developed through country-specific analyses of historical demographic trends. It builds on previous revisions by incorporating additional results from the 2010 and 2020 rounds of national population censuses as well as information from vital registration and recent nationally representative household sample surveys. The 2019 revision also presents population projections to the year 2100 that reflect a range of plausible outcomes at the global, regional and country levels. These Highlights summarise key population trends described by the estimates and projections presented in World Population Prospects 2019.

The latest edition of this classic text has been updated to reflect current trends and implications for future demographic developments. The areas of Africa, international migration and population and environment have been strengthened and statistical information has been updated throughout. A new edition of this classic history of demography text, which has been updated to strengthen the major subject areas of Africa, international migration and population and the environment Includes the latest statistical information, including the 2015 UN population projections revision and developments in China's population policy Information is presented in a clear and simple form, with academic material presented accessibly for the undergraduate audience whilst still maintaining the interest of higher level students and scholars The text covers issues that are crucial to the future of every species by encouraging humanity's search for ways to prevent future demographic catastrophes brought about by environmental or human agency Analyses the changing patterns of world population growth, including the effects of migration, war, disease, technology and culture