Census Differential Privacy Exploration

The U.S. Census Bureau has changed the way it ensures privacy for the 2020 Census. The new method is called Differential Privacy (DP). To help people assess some of the implications and unintended consequences of Differential Privacy, Caliper is providing several interactive maps for public inspection.

Population Difference

Census Differential Privacy Population Change

This map looks at the change in population by Congrssional District if Differential Privacy were applied to the 2010 Census

Rural Population Difference

Census Differential Privacy Rural Population Change

This map looks at the change in rural population by congressional district if Differential Privacy were applied to the 2010 Census

Adult Population Difference

Census Differential Privacy Adult Population Change

This map looks at the change in the adult population by TAZ if Differential Privacy were applied to the 2010 Census

Differential privacy distorts populations for Census Blocks and for all political subdivisions within each State. It is clear from these maps that the population changes will have an effect on redistricting because, had DP been used in 2010, legislative district boundaries would have been drawn differently.