与人口分布密切相关的是人口密度 – 人口地理学的另一个主题。人口密度通过将在场人数除以总面积来研究一个地区的平均人口数。通常这些数字是每平方公里或英里的人。有几个因素影响人口密度，这些因素通常也是人口地理学家研究的主题。这些因素可能与气候和地形等物理环境有关，也可能与某一地区的社会，经济和政治环境有关。例如，加利福尼亚州死亡谷地区等气候恶劣的地区人口稀少。相比之下，东京和新加坡人口密集，因为他们气候温和，经济，社会和政治发展。总体人口增长和变化是人口地理学家的另一个重要领域。这是因为在过去的两个世纪里，世界人口急剧增长。为了研究这个整体主题，通过自然增长来观察人口增长。这研究了一个地区的出生率和死亡率。出生率是每年每1000人中出生的婴儿数。死亡率是每年每1000人死亡的人数。人口的历史自然增长率曾接近于零，这意味着出生人数大致相当于死亡人数。然而，今天，由于更好的医疗保健和生活水平，预期寿命的增加降低了整体死亡率。在发达国家，出生率下降，但在发展中国家仍然很高。结果，世界人口呈指数增长。除自然增长外，人口变化还考虑了一个地区的净迁移。这是迁移内迁移和迁移迁移之间的区别。一个地区的总体增长率或人口变化是自然增长和净迁移的总和。研究世界增长率和人口变化的一个重要组成部分是人口转变模型 – 人口地理学的一个重要工具。该模型着眼于国家如何在四个阶段发展变化。第一阶段是出生率和死亡率高，因此自然增长很少，人口相对较少。第二阶段的特点是出生率高，死亡率低，因此人口增长很快（这通常是最不发达国家下降的地方）。第三阶段出生率下降，死亡率下降，再次导致人口增长放缓。最后，第四阶段的出生率和死亡率低，自然增长率低。
Closely related to population distribution is population density – another topic of population geography. Population density studies the average population of a region by dividing the number of people present by the total area. Usually these numbers are people per square kilometer or miles. There are several factors that influence population density, which are often the subject of demographs by demographers. These factors may be related to physical environments such as climate and terrain, and may be related to the social, economic, and political environment of a particular region. For example, climate-stricken areas such as the Death Valley region of California are sparsely populated. In contrast, Tokyo and Singapore are densely populated because of their mild climate, economic, social and political development. Overall population growth and change is another important area for demographers. This is because in the past two centuries, the world’s population has grown dramatically. In order to study this overall theme, population growth is observed through natural growth. This studied birth and death rates in a region. The birth rate is the number of babies born per 1,000 people per year. The death rate is the number of deaths per 1,000 people per year. The historical natural growth rate of the population was close to zero, which means that the number of births is roughly equivalent to the number of deaths. Today, however, increased life expectancy reduces overall mortality due to better health care and living standards. In developed countries, birth rates have fallen, but they remain high in developing countries. As a result, the world population has grown exponentially. In addition to natural growth, demographic changes also take into account the net migration of a region. This is the difference between a migration within a migration and a migration migration. The overall growth rate or demographic change of a region is the sum of natural growth and net migration. An important component of studying world growth rates and demographic changes is the demographic transition model, an important tool for population geography. The model looks at how the country is changing in four phases. The first stage is high birth rate and mortality, so there is little natural growth and a relatively small population. The second phase is characterized by high birth rates and low mortality, so the population grows rapidly (this is usually where the least developed countries decline). In the third phase, the birth rate fell and the mortality rate dropped, which again led to a slowdown in population growth. Finally, the fourth stage has a low birth rate and mortality rate and a low natural growth rate.