Evangelicalism is a worldwide interdenominational movement within Protestant Christianity that emphasizes the centrality of being born again and the authority of the Bible. Evangelical Christians are a diverse group of believers found in many churches, denominations, and nations. They are united by a shared commitment to the Gospel of Jesus Christ, which includes the belief that to be saved, a person must have a "born again" conversion experience, Jesuss death on the cross atones for mankinds sins, the Bible is the ultimate spiritual authority, and Christians ought to actively share their faith through witnessing and good works.

Evangelicals can be found in nearly every Protestant denomination and tradition, particularly within the Reformed, Plymouth Brethren, Baptist, Methodist, Lutheran, Moravian, Free Church, Mennonite, Quaker, Pentecostal/charismatic, and non-denominational churches. They are not a centralized group, and unlike Catholics, they do not have a pope. They can belong to almost any denomination.

Evangelical Christians are often associated with right-wing, fundamentalist Republican politics in Western culture, but there is nothing about being an evangelical that demands a certain political party or affiliation. The term "evangelical Christian" is intended to indicate a believer in Jesus Christ who is faithful in sharing and promoting the good news.

In summary, an evangelical Christian is a believer who holds to the inspiration, inerrancy, and authority of Scripture, the Trinity, the deity of Christ, and salvation by grace through faith alone. They are united by a shared commitment to the Gospel of Jesus Christ and actively share their faith through witnessing and good works. They can be found in many churches, denominations, and nations and are not a centralized group.