Click a state to display boundaries for its counties. Click again to hide the boundaries.
Select White, Black, or Hispanic to enable shading for the counties in a state. Selecting another value will automatically update the shading.
Zoom using the mouse wheel or the controls on the upper left of the map.
Double-click a county to display its data.
The shading level of a county indicates the relative value of the data selected. No shading represents a 0% data value, the darkest shading represents 100% of the data value, and other shading levels indicate an intermediate percentage value for the selected data.
States along the southern border are more interesting for this demo. Texas has a higher percentage Hispanic population, and states toward the East have a higher percentage Black population. These produce a better contrast between counties when displayed on the map.
Data for this page is taken from United States Census Bureau spreadsheets.