While 2020 Census data show that 7.2% of all family households were multigenerational nationwide, county level percentages are wide-ranging, from 0.5% to 31.0%.
Multigenerational households were more prevalent throughout the South, Puerto Rico and some western states. This is consistent with 2010 data that also showed a higher percentage of multigenerational households throughout the South and West.
In 2020, many counties in Alaska, California, Hawaii, Nevada, Oregon and Washington, for example, had a high percentage of multigenerational households (Table 1). However, other states in the West like Idaho, Montana and Wyoming, had many counties with a lower prevalence of multigenerational households. These households were also less common in the Midwest and Northeast.