![]() As of early 2017, the US population is just shy of 325 million people, a 130X increase over 241 years. Overall, there were estimated to be only 2.5 million people living in the original thirteen colonies in 1776, although that number should be taken with a grain of salt since the first census did not occur until 1790. Its physical environment ranges from the Arctic to the subtropical, from the moist rain forest to the arid desert, from the rugged mountain peak to the flat prairie. To put those numbers in some perspective, the densest areas in 1775 had slightly over 40 inhabitants per square mile (although density would have been higher in cities), whereas the Boston–Washington Corridor today has a density of over 930 inhabitants per square mile and the entire country has an average density of 91 people per square mile (including Alaska). The major characteristic of the United States is probably its great variety. While the map maker does not specify, the map likely only includes white colonists in their population figures, thus excluding Slaves and Native Americans. The models were validated with census tract and county subdivision population data in 2000 and were applied to generate five sets of 22 historical population maps from 17902010. Green dots exceed 18,000 persons within a mile, and consistently show the urban cores of cities. ![]() ![]() Gray dots are locations that have fewer than 600 people within a mile, while blue dots range from 601 to 18,000 persons within a mile. Even back then, what would become the Boston–Washington Corridor was clearly evident. description: This map shows how many people live within a mile of each location shown. The map above shows the population density of the original thirteen American colonies, the year before they declared independence. ![]()
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