Adults in always-intact marriages who worship at least weekly are the least likely of all to have had adulterous sexual relations.
According to the General Social Surveys (GSS), adults in always-intact marriages who attend religious services at least weekly are the most likely to be faithful to their spouses, with an adultery rate of 7.7 percent. Adults in always-intact marriages who never attend worship have a 15.3 percent rate of adultery, while among divorced or separated adults and married, previously-divorced adults, the rate is 23.3 percent for those who worship weekly and 33.8 percent for those who never worship.
Related Insights from Other Studies
Several other studies corroborate the direction of these findings. Mark Whisman of the University of Colorado at Boulder and colleagues reported that infidelity was "negatively associated with" religiosity and "was predicted by greater marital dissatisfaction."
Paul Amato and Stacy Rogers of the Pennsylvania State University also found that "frequent church attendance appears to lower the likelihood of divorce" and that infidelity was one of the "most consistent predictors of divorce," along with jealousy, drug use, drinking, and spending money foolishly.
As the data indicate, always-intact married adults who attend religious services at least weekly are the least likely to have committed adultery.
Dr. Fagan is senior fellow and director of the Marriage and Religion Research Institute (MARRI) at Family Research Council. Dr. Nagai is a visiting fellow at Family Research Council.
 This chart draws on data collected by the General Social Surveys, 1972-2006. From 1972 to 1993, the sample size averaged 1,500 each year. No GSS was conducted in 1979, 1981, or 1992. Since 1994, the GSS has been conducted only in even-numbered years and uses two samples per GSS that total approximately 3,000. In 2006, a third sample was added for a total sample size of 4,510.
 Mark A. Whisman, Kristina Koop Gordon, and Yael Chatav, "Predicting Sexual Infidelity in a Population-Based Sample of Married Individuals," Journal of Family Psychology 21 (2007): 320-24.
 Paul R. Amato and Stacy J. Rogers, "A Longitudinal Study of Marital Problems and Subsequent Divorce," Journal of Marriage and the Family 59 (1997): 612-24.