The Census Bureau has a blog. It’s called Random Samplings, which we think is a pretty great name. On said blog, the Census Bureau is running a series that will explore how the various geographic regions it tracks relate to one another.

“Geography is at the center of taking a census. We do not just count people; we count people where they live,” author Katy Rossiter writes. “Geography is important because it is the basis for taking a census and for tabulating census data. The Census Bureau also maintains unique geographic areas that other local, state and federal agencies use.”

The series just started, but the chart below that was included in the inaugural post does as good a job as we’ve seen summing up how the census divides the nation into geographic entities. Check it out.

Census geographies. (Census Bureau)