Why do they ask for the names of people living or staying in the household?

The Census Bureau asks for names to ensure that people are only counted once and in the right place. The Bureau uses names in combination with date of birth and other information to identify and reconcile potential “duplicates” (where the same person is counted in multiple households or on multiple forms).

Additionally, information provided in response to the 2020 Census will be made public after 72 years and this information is used by those interested in exploring their ancestry and genealogy.