Support
Get help or report a problem
Open a support request. Include your device and what you were looking at. Requests are public, so please leave out personal information.
Do I need an internet connection or an account?
No. All maps and data are stored in the app, and there is nothing to sign in to.
How do I change the map colors?
Tap the palette button at the top right of either map. Choose a preset or tap any color to change it. Reset All Colors, at the bottom of that screen, restores the originals.
Why do some counties show stripes?
Stripes mean there is no data for that place and year. For example, Alaska has no county-level data before 1970, and the yearly survey figures cover only counties of 20,000 people or more.
What does grey mean in the Change view?
On the census tract maps, grey means the change between the two periods was within the survey's margin of error, so it can't be told apart from no change.
Where does the data come from?
The U.S. Census Bureau and documented historical research datasets. The About tab and each map's Sources section list them in full.