Nondenominational Christianity (or non-denominational Christianity) consists of churches which typically distance themselves from the confessionalism or creedalism of other Christian communities by not formally aligning with a specific Christian denomination. Many non-denominational churches have a congregationalist polity, which is self-governing without a higher church authority.

Nondenominational Christianity arose in the 18th century through the Stone-Campbell Restoration Movement, with followers organizing themselves simply as "Christians" and "Disciples of Christ".

Often congregating in loose associations such as the Churches of Christ, or in other cases founded by individual pastors, few are affiliated with historic denominations, but many adhere to a form of evangelical Christianity. Most nondenominational Christians in the United States fall under Protestantism.