Here's Why The Census Bureau May Be In Your Neighborhood Before The 2020 Count

Starting this month, tens of thousands of Census Bureau workers are knocking on doors across the country to make sure the bureau has a complete list of addresses of where people live in the U.S.

Those addresses determine where the bureau will mail instructions and send the next major deployment of workers in 2020 for the constitutionally mandated head count of every resident, which is conducted by household.

"If the Census Bureau does not even have the address, what they miss is not just one person. It's the entire household, so it's serious stuff," says Jim Chang, Arizona's state demographer, whose office is working to make sure all of the state's home addresses are included.