Most American adults have lived with a romantic partner they weren’t married to by the time they hit their early 40s. A Pew Research Center analysis published August 12, 2026, puts the figure at 77% among adults ages 38 to 43 — the generation that came of age just as living together stopped being scandalous and started being ordinary.
If you’re in that age bracket, odds are you’ve already done it. Pew tracked a nationally representative group of Americans born between 1980 and 1984, checking in again in 2023 and 2024 when respondents were 38 to 43. What researchers found is a portrait of a life stage that barely existed for their grandparents’ generation but now touches most people you know.
Key Points
- 77% of adults ages 38-43 have cohabited with a partner outside marriage, per Pew.
- 40% have lived with one cohabiting partner, 22% with two, and 15% with three or more.
- 67% eventually married someone they had previously lived with.
- Cohabitation is more common among those without a four-year degree: 82% versus 70% of bachelor’s degree holders.
Education shapes the timing as much as the odds. Among people with a high school diploma or less, 40% moved in with a partner before turning 20, according to the same Pew report. Among bachelor’s degree holders, just 12% did. Whether that cohabitation turned into a wedding also splits along the same lines: 77% of college graduates eventually married a partner they’d lived with, compared with 59% of those with a high school education or less.
You can see the same climb in older federal data. In the mid-1990s, only 34% of women’s first live-in relationships were cohabitation rather than a wedding, according to a National Health Statistics Report from the CDC’s National Center for Health Statistics. By 2006-2010, that share had risen to 48%, climbing across nearly every racial and ethnic group the agency tracked.
Pew’s own earlier research shows the trend didn’t stop there. A 2019 Pew analysis found that among adults ages 18 to 44, 54% had ever cohabited in 2002, compared with 60% who had ever married — marriage was still the more common experience. By 2018, the numbers had flipped: 59% had cohabited versus just 50% who had married. For the first time, living together had overtaken walking down the aisle.
None of this means marriage is fading out. Two-thirds of people who cohabit still marry a partner they lived with, the new Pew data shows. What’s changed is the order of operations. For most Americans now in their early 40s, moving in together came first — a trial run, a financial necessity, or simply how modern relationships tend to unfold — and the wedding, if it happened, came later.
What was once treated as a departure from the script has become the script itself. The rare exception your grandparents worried about is now, statistically, what most people you know actually did.
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