Source: Pew Research Center
Two important demographic trends have influenced this phenomenon. The share of adults who are married has fallen, while the share living with a romantic partner has grown. However, the increase in cohabitation has not been large enough to offset the decline in marriage, giving way to the rise in the number of “unpartnered” Americans.
The share of adults who are unpartnered has increased across the young and middle-aged, but the rise has been most pronounced among young adults. Roughly six-in-ten adults younger than 35 (61%) are now living without a spouse or partner, up from 56% just 10 years ago.
The rise in adults living without a spouse or partner has also occurred against the backdrop of a third important demographic shift: the aging of American adults. Older adults (55 and older) are more likely to have a spouse or partner than younger adults. So it is surprising that the share of adults who are unpartnered has risen even though relatively more Americans are older.