Nearly 60 million Americans, 18% of the U.S. population, now share a home with at least three generations under one roof, according to Pew Research Center’s analysis of Census data, the most recent comprehensive look at the trend. That’s up from just 7% in 1971, when 14.5 million people lived this way. The population in multigenerational homes has more than quadrupled in fifty years, and the growth hasn’t been evenly spread. Young adults under 40 account for nearly half of that increase since 2000, a shift researchers trace back to delayed marriage, stretched-out education, and a housing market that no longer rewards moving out at 22.
The reasons families give for doubling and tripling up aren’t sentimental. They’re financial. Majorities across every income bracket cite money as a major or minor factor in the decision, according to Pew’s breakdown of why adults live in multigenerational households. Half of lower-income adults in these arrangements say it helps them financially, compared with 36% of middle-income and 24% of upper-income respondents. Caregiving runs a close second: about a third of people in multigenerational homes name it as a major reason, split roughly between caring for aging parents and caring for children.
Who’s most likely to live this way
The pattern breaks down sharply along lines of race, nativity, and geography. Black and Hispanic Americans live in multigenerational households at nearly double the rate of white Americans, 26% each, versus 13%. Asian Americans sit at 24%. Foreign-born residents are far more likely to share a home across generations than those born in the U.S., 26% compared with 17%, and the arrangement is most common in the West, where 21% of residents live multigenerationally, versus 14% in the Midwest. Metropolitan areas run slightly higher than the national average too, at 19%, which tracks with the housing-cost story: the places where rent and home prices have climbed fastest are also the places where combining households makes the most financial sense.
Age tells its own story. Adults aged 25 to 29 have the single highest rate of any group, 31%, and men in that bracket (37%) outpace women (26%), largely a function of men marrying and forming independent households later. On the other end, roughly one in five women 65 and older lives multigenerationally, often as the one being cared for rather than the caregiver.
A separate 2024 poll from the National Endowment for Financial Education puts numbers behind the strain these households absorb. Nearly half of adults in multigenerational or caregiving arrangements financially support an adult child or grandchild, and 78% of those provide direct financial assistance, mostly toward housing and living expenses, a median $500 a month. Almost three-quarters say caregiving duties have forced a difficult financial tradeoff: 20% took on credit card debt because of it, 13% made an unplanned early withdrawal from retirement savings, and 11% delayed retirement outright. Adults in these arrangements also report feeling more financially behind than the general population: 46% say their financial life is worse than they expected it to be at this age, compared with 31% of adults overall, and women in multigenerational households report that pessimism more than men, 52% to 41%.
The upside researchers keep finding
It isn’t only sacrifice. Pew’s data shows multigenerational households post a lower poverty rate, 10%, than other household types, at 12%, a gap that holds even though these homes are disproportionately lower-income to begin with. Pooling rent, splitting childcare, and having a retired parent on hand during the workday all function as an informal safety net that a single-generation household doesn’t have access to.
That safety net comes with friction, and Pew’s survey respondents are candid about it. Fifty-seven percent describe living multigenerationally as very or somewhat positive, but 23% say it’s stressful all or most of the time, and another 40% feel that stress at least sometimes. Roughly half of adults living with relatives beyond a spouse or partner call the experience rewarding most of the time, which means roughly half don’t, at least not consistently.
What’s changed isn’t the existence of the multigenerational household, plenty of cultures have never treated it as unusual. What’s changed is who’s ending up there and why. A 27-year-old moving back in with parents to pay off student loans, a couple bringing an aging mother into their home instead of a facility, a family splitting a mortgage three ways because none of them could afford one alone, these aren’t fringe stories anymore. They’re the fastest-growing living arrangement in the country, and the data suggests they’re becoming the default rather than the exception.
