Age gap relationship statistics: how rare big gaps really are, and divorce myths

You are dating someone seven or twelve years apart, and every comment section has an opinion: it won’t last, it’s creepy, or it’s nobody’s business. Most of those opinions rest on numbers nobody checked.

Here is what the official data say. In 2025, 63.0% of US opposite-sex married couples were within 3 years of each other, and only 8.1% had a gap of 10 or more years. The viral claim that a 5, 10 or 20-year gap raises divorce risk by 18%, 39% or 95% does not appear in the study it is attributed to. This page covers adults only.

Key numbers

• 63.0% of US opposite-sex married couples were within 3 years in 2025. Source
• 8.1% of US opposite-sex married couples had a 10-plus-year gap either way in 2025. Source
• 6.6% versus 1.5%: the husband was 10 or more years older versus the wife in 2025. Source
• 1.17% of US opposite-sex married couples had a 20-plus-year gap either way in 2023. Source
• 2.2 years was the average spousal age gap in 2022, down from 4.9 years in 1880. Source
• 1.034 was the per-year divorce hazard ratio behind the viral 18%, 39% and 95% figures, from a recently-married subsample of 1,627. Source
• 1879 is the earliest print instance of half your age plus seven that we found. Source

Table of contents

• What is the average age gap in relationships?
• How common are 10, 15 and 20 year age gaps?
• Is the man usually the older partner?
• Do age gap relationships last?
• Are couples with a big age gap less happy?
• What age gap do people say is acceptable?
• Where does half your age plus seven come from?
• How to cite this page
• The bottom line
• Sources

What is the average age gap in relationships?

The US summary is an average gap of 2.2 years in 2022. In 2025, 36.0% of married couples were within 1 year and 63.0% were within 3 years.

Pew’s comparison puts the 2022 average below 2.4 years in 2000 and 4.9 years in 1880. Its “two years apart or less” measure reached 51% in 2022, but is not comparable with the Census “within 1 year” bin. Denominator and boundary matter, so always name which measure a number comes from.

Computed from U.S. Census Bureau CPS ASEC 2025 data; opposite-sex couples living together.

The average can hide the fact that the distribution is concentrated near the same-age bins.

How common are 10, 15 and 20 year age gaps?

Ten-year gaps are uncommon, fifteen-year gaps are less common, and twenty-year gaps are rare. In 2025, 8.1% of opposite-sex married couples had a 10-plus-year gap either way; in the 2023 table, only 1.17% had a 20-plus-year gap.

Across married and unmarried opposite-sex couples in 2025, the Census counted 5.1 million couples in which the man was at least 10 years older and about 1.3 million in which the woman was at least 10 years older. The share with the husband 15 or more years older was 2.2% in 2023.

The 2023 table puts the husband 20 or more years older at 0.89% and the wife 20 or more years older at 0.28%. Those cells have sampling error, so the one-decimal figures are a scale indicator rather than a precise census.

In 2025, cohabiting couples had a 10-plus-year gap in 11.8% of cases, compared with 8.1% among married couples. That difference does not show that cohabitation creates larger gaps.

The Census counts couples living together at a point in time, not the chance that a relationship will form.

Is the man usually the older partner?

Yes, among US opposite-sex couples the man is usually older when ages differ. In 2025, the husband was at least 2 years older in 49.7% of married couples, while the wife was at least 2 years older in 14.3%; at 10 or more years, the comparison was 6.6% versus 1.5%.

Among 2025 cohabiting couples, the man was 10 or more years older in 8.8% and the woman in 3.0%. Pew found wider gaps among remarriages: 56% of husbands in a first marriage were roughly the same age as their wife, compared with 32% of remarried husbands, and 56% of remarried husbands had a wife at least 3 years younger, versus 35% in first marriages.

In England and Wales, five-plus-year gaps were more common among same-sex marriages and civil partnerships than opposite-sex marriages. In US 2023 data, the median married-couple gap was 2 years for male-female couples, 3 for female-female couples and 5 for male-male couples.

How old each of you reads at first glance shapes how a gap is perceived by strangers. Real World Appeal offers a free read of the first impression your photo gives; results are visible before payment, it is not a scientific instrument, and it does not assign a score.

These are population patterns, not dating instructions; signs an older woman likes you are about interaction, not a demographic percentage.

Do age gap relationships last?

The answer is that the divorce percentages are not reported probabilities, and the underlying study cannot establish that age gaps cause divorce. The study behind them was an online Amazon Mechanical Turk survey about wedding spending, with 3,370 responses and 3,151 after exclusions.

In the paper’s model, each additional year of respondent-spouse age difference was associated with a hazard ratio of 1.022 for all people, 1.041 for men and a non-significant 1.014 for women. A hazard ratio compares the rate an event occurs; it is not the probability a marriage ends.

The figures came from compounding 1.034 per year in the recently married subsample of 1,627. That arithmetic produces 18% at 5 years, 39% at 10 and 95% at 20, but the paper never reports those percentages. By the same arithmetic, the full-sample 1.022 would produce 11%, 24% and 55%; neither extrapolation appears in the paper.

Randal Olson removed his chart; a family-law blog and YourTango present the figures as fact, while Psychology Today notes The Atlantic cited the 18% and 39% numbers. Table 1 appears to use a signed age-difference variable, based on negative means; that is a caution, not an author statement.

A correlation can be informative, but it is not a forecast for your marriage. If you worry that a gap makes you look odd, most people never see the number; they see how the two of you are together.

Are couples with a big age gap less happy?

The happiness research is mixed and does not supply a US verdict. An Australian panel found satisfaction advantages for men with younger wives and women with younger husbands, but advantages faded within 6–10 years; differently aged couples showed larger declines after an economic shock.

Lee and McKinnish followed 3,374 first-marriage couples across 18,987 couple-years in the Australian HILDA panel, with spouses aged 20–55. Their result is about satisfaction, not divorce, and the authors describe shock-resilience as a possible mechanism, not a proven explanation.

Lehmiller and Agnew found that, among heterosexual women, women with younger male partners were the most satisfied with and committed to their relationships compared with women with older or similarly aged partners. A separate study of socially disapproved relationships found people invested less but were more committed; it did not isolate age-gap couples.

Satisfaction findings come from Australia or selected samples, so they should not be treated as a US divorce forecast.

What age gap do people say is acceptable?

There is no single acceptable age gap for consenting adults.

Buss’s 1989 study covered 37 samples from 33 countries and 10,047 participants. Men preferred wives 2.66 years younger, women preferred husbands 3.42 years older, and husband-wife gaps across 27 countries averaged 2.99 years. In every sample men preferred younger mates; the average preferred gap was under 3 years, and the largest male preference was in Zambia at 7.38 years.

Buunk and colleagues measured youngest and oldest acceptable ages across marriage, casual sex and sexual fantasies among people aged 20, 30, 40, 50 and 60. Their findings do not validate half-plus-seven. Kenrick and Keefe reported men’s preference for younger women became more pronounced with age, while younger women preferred older men and changed less with age.

OkCupid reported that its median 31-year-old man set a range of 22 to 35, while its median 42-year-old man accepted a woman up to 15 years younger but no more than 3 years older. Those are settings from one dating site in 2010, not relationships formed; online dating statistics for men need the same denominator warning.

Half-plus-seven tells you what’s allowed. The Census tells you what’s normal. A 50-year-old can satisfy the rule with a 32-year-old, yet only 6.6% of husbands were 10 or more years older in 2025.

Stated preferences, platform settings and formed relationships measure different stages of dating, so none is a complete acceptability test.

Where does half your age plus seven come from?

The formula is older than the internet, but its origin is uncertain. The earliest print instance we found is Frederick Locker’s 1879 Patchwork; Max O’Rell repeated it in 1901 as advice he had “heard the other day.”

The arithmetic gives a 30-year-old 22, a 40-year-old 27 and a 50-year-old 32. At 20 it is 3 years, while at 50 it is 18 years. Those are outputs of the formula, not findings.

Patchwork is a commonplace book, so 1879 is the earliest print instance, not a proven invention date.

How to cite this page

Suggested citation: Real World Appeal. “Age gap relationship statistics: how rare big gaps really are, and divorce myths.” realworldappeal.com, September 2026. https://realworldappeal.com/blog/age-gap-relationship-statistics

The primary Census files, studies and archival texts are linked so readers can cite them directly. Sources were retrieved 13 September 2026; the 2025 Census couple-characteristics file supplies the coarse bins, while 2023 Tables FG3 and UC3 supply the finer bins because the 2024–2025 versions were not available.

The bottom line

Age gaps are real and not doomed. In the US, 10-plus-year gaps are uncommon, and 20-plus-year gaps are rare; the 18%, 39% and 95% divorce figures are a misread of a compounded hazard ratio, not reported probabilities.

Half-plus-seven tells you what’s allowed. The Census tells you what’s normal. Use the rule as a piece of social folklore, the Census as a description of prevalence, and relationship research as a reminder that satisfaction can change with time and stress.

Try Real World Appeal’s free first-impression photo read before payment. It is not a clinical or scientific instrument, and it does not decide whether a relationship will work.

Sources

• U.S. Census Bureau (2026). Current Population Survey Annual Social and Economic Supplement 2025, Couple Characteristics 2025 data file. Linked source
• Clayton Buck and Paul Hemez, U.S. Census Bureau (2026). Over a Third of Partners in Opposite-Sex Couples Were the Same Age. America Counts. Linked source
• U.S. Census Bureau (2023). America's Families and Living Arrangements: 2023, Table FG3. Linked source
• U.S. Census Bureau (2023). America's Families and Living Arrangements: 2023, Table UC3. Linked source
• Richard Fry, Pew Research Center (2024). Growing share of US husbands and wives are roughly the same age. Pew Research Center. Linked source
• Gretchen Livingston, Pew Research Center (2014). Tying the knot again? Chances are, there’s a bigger age gap than the first time around. Pew Research Center. Linked source
• Office for National Statistics (2023). People’s living arrangements in England and Wales: Census 2021. Linked source
• Christopher A. Julian, National Center for Family & Marriage Research (2025). Age Composition of Same-sex & Different-sex Couples, 2023. NCFMR Family Profile No. 16. Linked source
• Andrew Francis-Tan and Hugo M. Mialon (2015). “A Diamond Is Forever” and Other Fairy Tales: The Relationship between Wedding Expenses and Marriage Duration. Economic Inquiry 53(4):1919–1930. Linked source
• Randal S. Olson (2014). What makes for a stable marriage? Part 2. Linked source
• Minnesota Family Law Blog (undated). Divorce and the Age Gap: At What Point Does the Gap in Years Between Spouses Increase the Likelihood for Divorce? Linked source
• YourTango (undated). This Specific Age Gap Makes Divorce Much More Likely, According To Research. Linked source
• Psychology Today (2021). Do Relationships With Major Age Differences Last? Linked source
• Wang-Sheng Lee and Terra McKinnish (2018). The Marital Satisfaction of Differently Aged Couples. Journal of Population Economics 31(2):337–362. Linked source
• Justin J. Lehmiller and Christopher R. Agnew (2008). Commitment in Age-Gap Heterosexual Romantic Relationships: A Test of Evolutionary and Socio-Cultural Predictions. Psychology of Women Quarterly 32(1):74–82. Linked source
• Justin J. Lehmiller and Christopher R. Agnew (2006). Marginalized Relationships: The Impact of Social Disapproval on Romantic Relationship Commitment. Personality and Social Psychology Bulletin 32(1):40–51. Linked source
• Bram P. Buunk, Pieternel Dijkstra, Douglas T. Kenrick and Astrid Warntjes (2001). Age preferences for mates as related to gender, own age, and involvement level. Evolution and Human Behavior 22(4):241–250. Linked source
• Douglas T. Kenrick and Richard C. Keefe (1992). Age preferences in mates reflect sex differences in human reproductive strategies. Behavioral and Brain Sciences 15(1):75–91. Linked source
• David M. Buss (1989). Sex differences in human mate preferences: Evolutionary hypotheses tested in 37 cultures. Behavioral and Brain Sciences 12(1):1–14. Linked source
• Daniel Conroy-Beam and David M. Buss (2019). Why Is Age So Important in Human Mating? Evolved Age Preferences and Their Influences on Multiple Mating Behaviors. Evolutionary Behavioral Sciences 13(2):127–157. Linked source
• Frederick Locker (1879). Patchwork. London: Smith, Elder & Co., p. 88. Linked source
• Max O’Rell (1901). Her Royal Highness Woman. Project Gutenberg eBook #33285. Linked source
• Christian Rudder, OkCupid (2010). The Case For An Older Woman. OkTrends, archived. Linked source