Secularization Fueling Declining Birth Rates in the U.S.

According to a recent report, the United States is experiencing declining birth rates, and this trend is partly attributed to the growing secularization of the population. As of 2025, the U.S. fertility rate is projected to average 1.6 births per woman, which is below the replacement rate of 2.1 births required to maintain a stable population.

The report reveals that the number of religiously unaffiliated Americans, including atheists, agnostics, and those who identify as "nothing in particular," has increased by 13% since 2007, now accounting for 29% of the national population. In contrast, 62% of Americans describe themselves as Christian, and 7% belong to other religions.

Experts have found a strong correlation between religious attendance and higher fertility rates. Families that attend religious services weekly have maintained fertility rates above 2 children per woman, while those who attend less than weekly have seen rates drop to around 1.7, and the non-religious have rates below 1.5.

The practical support systems provided by religious communities, such as childcare, schools, and family support services, are cited as a key factor in this relationship. When these community ties weaken, the burden of raising children can become too costly for many, leading to lower birth rates. Additionally, the report suggests that the decline in religious participation has coincided with a decrease in the practical help and role models that religious communities often provide for parents.

While the report acknowledges that there are other significant factors contributing to the fertility decline, such as economic pressures and cultural shifts, the link between secularization and falling birth rates is a notable trend that warrants further attention and potential policy responses to support families.