From: US Census
Ninety-five percent of households will receive an initial invitation to respond to the 2020 Census in the mail. Depending on how likely your area is to respond online, you’ll receive either an invitation encouraging you to respond online or an invitation along with a paper questionnaire.
In areas where 20 percent or more of the households need Spanish assistance, the invitations will be in both English and Spanish.
Most areas of the country are likely to respond online, so most households will receive a letter asking you to go online to complete the census questionnaire (or to respond by phone).
Areas that are less likely to respond online will receive a paper questionnaire along with their invitation. The invitation will also include information about how to respond online or by phone.