The enumeration began on the first Monday of August, and was scheduled to conclude within 6 calendar months however, the time prescribed for completing the enumeration was extended to September 1, 1821. Since 1870, when the total land area reached about three and a half million square miles, the population density has risen at the same rate as the growth in population. The fourth census was taken under the provisions of an act of March 14, 1820. Since then, population density rose by approximately 16 each decade. At that time, the population density was about 11 per sq mile, and then the population has doubled in the last century.
population rise began nearby 1870 and the population density doubled in 1900. While every census region grew considerably during the twentieth century, the South and West experienced the largest increases in population. Even the purchase of Alaska was not able to reverse the increase in density. counties by population density from 1990 to 2020. Population change is the rate of change in population between decennial census years. However, the corresponding increases in population resulted in a regular rise in the number of Americans per square mile in every decade except 18, when the aforementioned actions were taken. At the moment, about 328 million people are living in the U.S, a nation that's 9.84 million sq km (3.53 million square miles). In the first century of its existence, the United States added regularly to its store of undeveloped land through acquisitions such as the Louisiana Purchaes and conquest, which brought in a great deal of land that had formerly belonged to Mexico. population density has changed from the 18th century to the present. Population, Land Area and Density, 1790-2020