Quick Answer: Catholics are Christians. Period. “Christian” is the broad name for anyone who follows Jesus Christ, and “Catholic” is one branch of it, led by the Pope. So when someone asks what the difference is between Catholic and Christian, they usually mean Catholic vs. Protestant.
- Every Catholic is a Christian. Not every Christian is Catholic.
- Catholics accept the Bible plus Sacred Tradition. Most Protestants say the Bible is enough.
- Catholic Bibles have 73 books. Protestant Bibles have 66 books.
- Catholics have seven sacraments, and Protestants have two.
- Both believe in the Trinity, Jesus’ death and resurrection, and the Bible as God’s Word.
What Does “Christian” Mean?
A Christian follows Jesus. Acts 11:26 says believers were first called “Christians” in Antioch. Today there are three big branches: Catholic, Eastern Orthodox, and Protestant. Protestants include Baptists, Methodists, Lutherans, and Pentecostals.
The Pew Research Center states the number of Christians was about 2.3 billion in 2020, which makes it the world’s biggest religion. In the US, Pew’s 2023-24 Religious Landscape Study found 62% of American adults call themselves Christian. About 19% say Catholic.
What Does “Catholic” Mean?
“Catholic” comes from the Greek “katholikos”, which just means “universal.” St. Ignatius of Antioch was tossing around the phrase “Catholic Church” by about AD 110.
The Catholic Church is the largest single Christian body. The Vatican’s Annuarium Statisticum Ecclesiae counted 1.422 billion Catholics at the end of 2024, roughly 17.8% of everybody alive.
HQ is Vatican City. Pope Leo XIV is in charge, elected in May 2025. He’s the first American pope in history.
How Did Christians Split?
For about a thousand years, it was mostly one church. Then in 1054, the Great Schism broke East from West, and the East went on to become the Orthodox Church.
In 1517, the split occurred again. A German monk named Martin Luther posted his 95 Theses, and the Protestant Reformation was on. Luther, John Calvin, and others walked away from the Pope’s authority. Today there are thousands of Protestant denominations.
Also Read: What Is a Conclave? The Word Means Locked In
Key Differences Between Catholics and Other Christians
Catholica, a site written by a convert from Protestantism, figures Baptists and Evangelicals agree with about 85% of Catholic teaching. So the fight is over the other 15%.
1. Authority: Bible and Tradition
Catholics have two sources: Sacred Scripture and Sacred Tradition, the teaching passed down from the apostles. The Magisterium (the Church’s teaching office) decides how to read both. Catholics point straight to Matthew 16:18, where Jesus tells Peter, “You are Peter, and on this rock I will build my church.”
Protestants? Most go with sola scriptura. Scripture alone. There is no middleman.
2. The Bible Itself
A Catholic Bible has 73 books: 46 in the Old Testament and 27 in the New. Protestant Bibles have 66.
The missing seven are Tobit, Judith, 1 and 2 Maccabees, Wisdom, Sirach, and Baruch. Catholic editions also contain additional passages in Esther and Daniel, but those are not two additional books. Luther moved them into a separate “Apocrypha” section. He wasn’t sold on Hebrews, James, Jude, or Revelation either.
3. The Pope
To Catholics, the Pope is Peter’s successor, part of a chain that runs back to the apostles. In 1870, the First Vatican Council said the Pope can teach without error on faith and morals. But only in rare, formal cases. He’s not making judgments about everything.
Protestants don’t accept his authority at all. The Orthodox give him the title of “first among equals” and no more.
4. Sacraments and Communion
C3 Powerhouse defines the Catholic seven: Baptism, Eucharist, Confirmation, Reconciliation, Anointing of the Sick, Holy Orders, and Matrimony. Most Protestants keep two: baptism and the Lord’s Supper.
Communion is where it gets serious. Catholics believe in transubstantiation, so the bread and wine really become Christ’s body and blood. Not a symbol. The real thing. Lutherans hold to a real presence, Calvinists to a spiritual one, and most Baptists and Evangelicals see it as a memorial meal.
5. Salvation
Can you lose your salvation? It depends on who you ask. Many Protestants preach sola fide, faith alone, and many Baptists and Evangelicals believe that once you’re saved, you’re saved.
Catholics see it as a lifelong road, walked with faith, meaningful works, and the sacraments. Their go-to verse is James 2:24: “You see that a person is considered righteous by what they do and not by faith alone”. The gap shrank in 1999, when Catholics and Lutherans signed a Joint Declaration.
6. Sin and Confession
Everybody agrees on original sin. Some Protestants just see it as total corruption, while Catholics see it as damage, not ruin. Catholics also split sins into mortal and venial, and mortal sins go to a priest in confession. Protestants talk straight to God.
7. Mary and the Saints
Super Praise Christian explains that Catholics ask Mary and the saints to pray for them, kind of like asking a friend. That’s honor, not worship. Catholics also believe Mary was conceived without sin and taken body and soul into heaven. Most Protestants pray to God only.
8. The Afterlife
Heaven and hell? Both sides agree. Catholics add Purgatory, a temporary cleanup before heaven, and they pray for the dead. Most Protestants pass.
9. Worship, Clergy, and Daily Life
Walk into a Mass, and you’ll hear set prayers and readings. Many Protestant churches lean more on the sermon and the worship band. Diffen’s comparison chart notes that Catholics are fine with statues and images, while plenty of Protestant churches keep it to a plain cross.
Catholic priests are men and usually celibate. Many Protestant pastors are married, and some churches ordain women.
10. The Cross and Your Walk with Jesus
Protestants often see the cross as Jesus taking our punishment. Catholics, borrowing from St. Anselm, talk more about His perfect obedience. Both want a personal relationship with Jesus. Catholics just think the Church helps it grow.
Also Read: What Does the Pope Do? The Job, Explained
What Catholics and Protestants Share
They agree on the stuff that matters most. One God in three persons. Jesus was born of a virgin, died for our sins, rose again, and is coming back.
FAQs
Are Catholics Christians?
Yes. They follow Jesus, so they’re Christians. Catholicism is just the biggest branch.
Why do people treat “Catholic” and “Christian” as different?
Mostly habit. Many Protestants call themselves “Christian,” while Catholics say “Catholic”.
Do Catholics and Protestants use the same Bible?
Almost. The New Testament matches, but Catholic Bibles add seven Old Testament books.
Do Catholics worship Mary?
No. They honor her and ask for her prayers. Worship goes to God alone.
What is the biggest difference between Catholics and Protestants?
Authority. Catholics follow the Bible, tradition, and the Pope. Most Protestants follow the Bible alone.
Can a Protestant become Catholic?
Sure. Adults usually join through OCIA, formerly RCIA, which includes classes, prayer, and the sacraments.
Sources & References
- Catholica – Baptists and Evangelicals agree with about 85% of Catholic teaching.
- C3 Powerhouse – The Catholic seven are Baptism, Eucharist, Confirmation, Reconciliation, Anointing of the Sick, Holy Orders, and Matrimony.
- Diffen – Catholics allow statues and images, while many Protestant churches use a plain cross.
- Super Praise Christian – Catholics ask Mary and the saints to pray for them, kind of like asking a friend.
