Watch 220 Years Of US Population Expansion

We used SocialExplorer to generate population density maps from the 1790 to 2000 decennial censuses at the county level. For 2010, we used the American Home Community Survey 5-year estimate.

We broke the data down into deciles for each year with each color representing a decile of population density. The blues are the bottom deciles and the oranges are the upper deciles.

1. 1790

2. 1800

3. 1810

4. 1820

5. 1830

6. 1840

7. 1850

8. 1860

9. 1870

10. 1880

11. 1890

12. 1900

13. 1910

14. 1920

15. 1930

16. 1940

17. 1950

18. 1960

19. 1970

20. 1980

21. 1990

22. 2000

23. 2010

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