8. United States – 39%
In the United States, nearly 39% of married women confess to infidelity. The vast and diverse cultural landscape, coupled with high mobility and digital connectivity, creates opportunities for extramarital relationships. Factors such as workplace dynamics, social pressures, and changing relationship expectations also play a role. While some regions emphasize traditional family values, others adopt a more liberal attitude toward relationships, making the U.S. one of the leading countries for marital unfaithfulness.