Two Centuries of Population, Animated

A visual history of a growing United States.

You’ve likely seen the population density map of the United States in one form or another. A lot of people per square mile reside in big cities, fewer people reside in suburban areas, and a lot fewer people reside in rural areas. Cities weren’t always cities though. Rural wasn’t always rural. If you look at people per square mile over a couple of centuries, you get a better idea of how the country developed.

The animated map above shows population density by decade, going back to 1790 and up to recent estimates for 2015. The time in between each time period represents a smoothed transition. This is approximate, but it gives a better idea of how the distribution of population changed.

As you watch, keep in mind that the map is based on data that was available and that it only represents the United States population.

This is especially notable during the first century. No data shows in much of the country, the estimates are spotty in many territories, and there were people who lived in the blanked out areas before newcomers settled.

Nerd Notes

  • I used R to generate the maps and FFmpeg to string the images into a video.
  • Data are originally from the Census Bureau but made much more accessible by NHGIS.

Become a Member
Support an independent site. Make great charts.

Join Now

Favorites

How We Spend Our Money, a Breakdown

We know spending changes when you have more money. Here’s by how much.

Top Brewery Road Trip, Routed Algorithmically

There are a lot of great craft breweries in the United States, but there is only so much time. This is the computed best way to get to the top rated breweries and how to maximize the beer tasting experience. Every journey begins with a single sip.

The Best Data Visualization Projects of 2011

I almost didn’t make a best-of list this year, but …

The Changing American Diet

See what we ate on an average day, for the past several decades.