Gallup found some differences by subgroup:

The more dense the area where a person lives, the more likely they are to self-isolate. Residents of urban areas (84%) are more likely than those living in suburbs (79%) and rural areas (67%) to say they are completely or mostly isolated from people outside their home.

Among political party identification groups, Democrats (84%) are most likely to report being completely or mostly isolated. Most independents (73%) and Republicans (66%) have isolated themselves to the same degree.

Americans who are not currently working (84%) are more likely to report isolation than those who are currently working (69%).