The United States has 320 million people. It is the third most populated country in the world behind China (1.36 billion) and India (1.29 billion). Although the United States has a large population, it is not very crowded. The population density is pretty low at 91 people per square mile; 178 countries in the world are more crowded than the United States. However, there are large urban areas with higher population densities; 81.6% of the population in the United States lives in urban areas. These are the five largest cities in the United States:
New York City, New York
Los Angeles, California
The fertility rate (average children per woman) for the United States is only 1.87, which is lower than the 2.1 required to maintain a country's population. The population pyramid below reflects our slow growth.
Yet the United States' population is not shrinking. The growth rate is almost 1% per year, which is average, and all of the growth in the United States is due to immigration. The net migration rate is 3.9 people per 1,000, which adds up to over 1 million immigrants added each year. The United States ranks first in the world for accepting immigrants.
The United States is a developed country based on our income, health, and education. We are ranked 17th in the world for GDP per capita at $57,300. This means we produce a lot of goods and services, which also means that we earn enough income to buy a lot of goods and services. We also have a high life expectancy at 79.8 years. This means that we have access to good food, clean water, sanitation facilities, and medical care. Our literacy rate is 99%, which means that our population is very educated. These three pieces of data support that the United States is a developed country. Because we are so developed, we have a lot of industries in our country: