What's the average marriage length today?

How Long Do Marriages Last Today?

Marriage is a lifelong journey for many, but how long do most marriages actually last? Recent data offers a clearer picture. In 2018, the median duration of a first marriage in the United States was 21 years. This means half of those in their first marriage had reached at least that milestone, while the other half experienced marriage ending sooner—whether through divorce, separation, or other circumstances.

Interestingly, the story shifts slightly for those entering second marriages. On average, the median duration drops to 17 years. This shorter span may reflect the complexities that come with blended families, past relationship experiences, or different expectations the second time around. While not universal, patterns suggest second marriages can face unique challenges that influence their longevity.

It’s important to note that “median” duration isn’t the same as “average” in the traditional sense—it represents the midpoint where half of marriages last longer and half don’t. And while numbers give us insight, they don’t capture the richness of individual experiences. Many first marriages endure well beyond two decades, and some second marriages thrive just as long.

Social trends, economic factors, and evolving views on partnership all play roles in shaping how long marriages last today. Still, commitment, communication, and mutual support remain at the heart of lasting relationships—far more than any statistic can measure.