Although much research has examined the relationship between religion and abortion attitudes, few studies have examined whether religion influences abortion behavior. This study looks at whether individual and school religiosity influence reported abortion behavior among women who become pregnant while unmarried. Hierarchical Logistic Models are implemented to analyze two waves of data from the National Longitudinal Study of Adolescent Health. Findings show that personal religiosity is unrelated to reported abortion behavior. However, conservative Protestants appear less likely to obtain abortions than mainline Protestants, Catholics, and women of non-Christian faiths. Regardless of personal religious affiliation, having attended a school with a high proportion of conservative Protestants appears to discourage abortion as women enter their twenties. Conversely, women from private religious high schools appear more likely to report obtaining an abortion than women from public schools. (Contains 2 figures, 2 tables and 13 notes.)