A sacramental in Christianity is a material object or action (in Latin sacramentalia) ritually blessed by a priest to signal its association with the sacraments and so to incite reverence during acts of worship. They are recognised by the Catholic Church, the Eastern Orthodox Church, the Oriental Orthodox Churches, the Church of the East, the Lutheran churches, the Old Catholic Church, the Anglican churches, Independent Catholic churches, and Methodist churches.

In the Bible, prayer cloths and holy oil are mentioned in reference to praying for healing. Holy water is a sacramental that believers use to recall their baptism; other common sacramentals include blessed candles (often given to churchgoers on Candlemas), blessed palms (given away at churches on Palm Sunday), blessed ashes (placed on believers' foreheads on Ash Wednesday services), a cross necklace (often taken to be blessed by a pastor before daily use), a headcovering (worn by women, especially during prayer and worship), blessed salt, and holy cards, as well as Christian art, especially a crucifix. Apart from those worn daily, such as a cross necklace or devotional scapular, sacramentals such as a Family Bible, are often kept on home altars in Christian households. When blessed in a betrothal ceremony, engagement rings become a sacramental.

As an adjective, sacramental means "of or pertaining to sacraments".