Learn about human migration, the permanent or semi-permanent relocation of people from one location to another.

An overview of the subject of study known as population geography, a branch of geography which studies and maps the distribution of people across the planet. This overview of population geography comes from the About.com Geography GuideSite.

Learn about the ageing population of the United Kingdom in this population geography article.

Will you complete the Census 2010 form from the U.S. Census Bureau?

Twenty countries have zero or negative natural population growth and almost all will see significant population losses by the year 2050. Your About.com Guide to Geography explains.

A comprehensive overview and explanation of sex ratio, the demographic ratio of men to women as expressed as a ratio. From your About.com Guide to Geography.

Population growth rates and doubling times are fascinating demographic variables that are used to estimate a country's future population, from your About.com Guide to Geography.

Learn the meaning behind the term population density and find out how it relates to poulation and land area, from your About.com Guide.

Discover the ins and outs of China's One Child Policy, designed to limit population growth in the world's largest country. All about the One Child Policy in China from your About.com Guide to Geography.

Thomas Malthus is a key figure in demography; he thought that human population increases much faster than agricultural production, thus the end result is inescapable misery and poverty. Learn about the theory of Thomas Malthus from your About.com Guide to Geography.

Life expectancy from birth is a frequently utilized and analyzed component of demographic data for the countries of the world. It represents the average life span of a newborn and is an indicator of the overall health of a country. Learn about life expectancy from from your About.com Guide to Geography.

Your About.com Guide to Geography provides an overview and information about the total fertility rate and how it impacts a country's population.

Learn about Jewish migration after World War II and the Holocaust. Many Jews were known as Displaced Persons following the war and had no home to go to.

China's current population and information about Chinese population growth, from your About.com Guide to Geography.

The 2010 Census in the United States is a complete count of the U.S. population as of April 1, 2010. The 2010 Census is required by law and every household will receive a questionnaire in the mail.

An overview of the Crude Birth Rate, from your About.com Guide to Geography.

The Baby Boom of 1946 to 1964 in the United States (and similar years in Allied countries) was a huge increase in the number of births. Learn all about the Baby Boom from your About.com Guide to Geography.

The demographic transition model seeks to explain the transformation of countries from having high birth and death rates to low birth and death rates. In developed countries this transition began in the eighteenth century and continues today. Less developed countries began the transition later and are still in the midst of earlier stages of the model.

Recent generations in the United States and their names.

Age-sex pyramids are used to graphically display vital demographic information about a population. Learn all about the key types of age-sex pyramids.

Learn about issues related to maternal and infant health and mortality around the world, with a focus on developing countries.