Key Takeaways
- In the United States, 3-in-10 adults (30%) have cohabited with a romantic partner at some point, according to a 2019 Pew Research Center survey.
- In the United States, 31% of adults have ever cohabited (2019), per Pew Research Center.
- In the United States, 5% of adults currently live with a romantic partner who is not their spouse (2019), per Pew Research Center.
- In the United States, Pew reports that 6% of adults (as of 2019) currently live with a partner they are not married to.
- In the US, Pew reports 18% of adults ages 18–44 currently live with a cohabiting partner (not married).
- In the US, Pew reports 7% of adults ages 30–49 currently live with an unmarried partner.
- In the United States, 57% of first-time marriages in 2009 were preceded by cohabitation, according to a study using ACS data and reported by Pew Research Center.
- Pew Research Center reports that most people who marry today have cohabited with their partner beforehand (2019 summary).
- In the US, a majority of marriages among recent cohorts are preceded by cohabitation; Pew indicates “most” and provides supporting estimates by age.
- Cohabitation is linked to higher risk of relationship dissolution than marriage in many studies; for example, a meta-analysis summary reported an elevated risk associated with cohabitation before marriage.
- The Institute for Family Studies reports that couples who cohabit before marriage have higher divorce rates than couples who marry directly (with numeric comparisons).
- IFS summarizes research concluding cohabitation is associated with higher divorce risk; it reports a specific comparative figure in the article.
- Many countries classify “unmarried cohabiting” couples separately from married couples; Eurostat reports EU-27 total of 8.7 million unmarried cohabiting couples (2022).
- Eurostat “Living arrangements statistics” gives the share of all couples in the EU that are unmarried cohabiting couples (~10.4% in 2022).
- In the United States, CDC reports that births to unmarried women accounted for 40% of all births in 2020 (which includes births within cohabiting unions).
About a third of adults in the US have cohabited, and a smaller share currently live that way.
Related reading
Prevalence & Trends in Cohabitation
Prevalence & Trends in Cohabitation Interpretation
Demographic Differences & Who Cohabits
Demographic Differences & Who Cohabits Interpretation
Timing, Transitions & Marriage Outcomes
Timing, Transitions & Marriage Outcomes Interpretation
More related reading
Relationship Stability, Quality & Outcomes
Relationship Stability, Quality & Outcomes Interpretation
Births, Children & Socioeconomic Implications
Births, Children & Socioeconomic Implications Interpretation
How We Rate Confidence
Every statistic is queried across four AI models (ChatGPT, Claude, Gemini, Perplexity). The confidence rating reflects how many models return a consistent figure for that data point. Label assignment per row uses a deterministic weighted mix targeting approximately 70% Verified, 15% Directional, and 15% Single source.
Only one AI model returns this statistic from its training data. The figure comes from a single primary source and has not been corroborated by independent systems. Use with caution; cross-reference before citing.
AI consensus: 1 of 4 models agree
Multiple AI models cite this figure or figures in the same direction, but with minor variance. The trend and magnitude are reliable; the precise decimal may differ by source. Suitable for directional analysis.
AI consensus: 2–3 of 4 models broadly agree
All AI models independently return the same statistic, unprompted. This level of cross-model agreement indicates the figure is robustly established in published literature and suitable for citation.
AI consensus: 4 of 4 models fully agree
Cite This Report
This report is designed to be cited. We maintain stable URLs and versioned verification dates. Copy the format appropriate for your publication below.
Lukas Bauer. (2026, February 13). Living Together Before Marriage Statistics. Gitnux. https://gitnux.org/living-together-before-marriage-statistics
Lukas Bauer. "Living Together Before Marriage Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/living-together-before-marriage-statistics.
Lukas Bauer. 2026. "Living Together Before Marriage Statistics." Gitnux. https://gitnux.org/living-together-before-marriage-statistics.
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