United States

Maps of the US

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The Population of Manhattan Mapped

In 2020, 1,694,251 people were living in Manhattan. The population density of this borough was about 72,918 people per square mile (28,154/km²). It is the highest population density of any county in the U.S. But this is not a record in the history of Manhattan. In 1910, at the height of European migration to New York, Manhattan’s population density peaked 101,548 people per square mile (39,208/km²).

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Economic mapsEnvironment maps

Climate Change and the U.S. Economy: A County-and-State Perspective

Climate change is projected to have vastly different economic impacts across U.S. states and counties, with coastal regions facing the heaviest financial burden. Florida and Texas each face potential GDP losses exceeding $100 billion, while states like Vermont and New Hampshire show minimal projected impacts. The analysis reveals that lower-income counties often bear a disproportionate burden of climate-related economic damage, highlighting the need for equitable adaptation policies.

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Historical MapsWars

Operation Barbarossa Superimposed onto a map of the U.S.

Operation Barbarossa was the invasion of the USSR by Nazi Germany and many of its Axis allies, starting on Sunday, 22 June 1941, during World War II. The military operation, codenamed after Frederick Barbarossa (“red beard”), a 12th-century Holy Roman emperor and German king, put into activity Nazi Germany’s ideological goal of occupying the western USSR to repopulate it with Germans.

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