Abstinence pledges are commitments made by people, often though not always teenagers and young adults, to practice abstinence, usually in the case of practicing teetotalism with respect to abstaining from alcohol and other drugs, or chastity, with respect to abstaining from sexual intercourse until marriage; in the case of sexual abstinence, they are sometimes also known as purity pledges or virginity pledges. They are most common in the United States among Catholic and Evangelical Christian denominations, while others are nonsectarian.

Evangelicalism, also called evangelical Christianity or evangelical Protestantism, is a worldwide interdenominational movement within Protestant Christianity that emphasizes the centrality of sharing the "good news" of Christianity, being "born again" in which an individual experiences personal conversion, as authoritatively guided by the Bible, God's revelation to humanity. The word evangelical comes from the Greek word for 'good news'.