Interactive Data Visualization

Population Pyramid

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Geo-Map of Counties

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Special thanks to The Attic in the College of Information Science & Technology for developing these tools.

Source: U.S. Census Bureau Annual Estimates by Sex, Race, and Hispanic Origin as of July 1^st per corresponding year (Table: PEPASR6H).

Methodological Note on Population Pyramid: Up to 2010, the original statewide datasets from the U.S. Census Bureau only provide annual estimates for 5 year-age groups. In order to convert these data to single years of age, an interpolation method using Karug coefficients was applied.

The sum of the single age year estimates in this interactive display match the 5-year age group annual estimates published by the U.S. Census Bureau and the total census counts for years 2000 and 2010. Slight differences are due to rounding.

It is important to note that the U.S. Census Bureau published a separate estimate for the population under 1-year-old for each county during the 1990s and 2000s. Hence, our interpolated estimates for this population during those years differ from those published.

If you are interested in this particular population, we encourage you to consult the historical datasets available at census.gov/popest/.