How Many Books Are in the Bible?
The answer depends on which Bible tradition you mean.
Most Protestant Bibles contain 66 books, while Catholic Bibles contain 73 and Eastern Orthodox Bibles can include even more.
Those differences come from the biblical canon, the set of writings each faith community recognizes as authoritative.
Understanding the counts helps explain why Bibles printed in different traditions do not all contain the same books.
Quick Answer by Tradition
When people ask how many books are in the Bible, they are usually asking about one of three major Christian canons:
- Protestant Bible: 66 books
- Catholic Bible: 73 books
- Eastern Orthodox Bible: typically 76 to 81 books, depending on the jurisdiction
The difference is mainly in the Old Testament.
The New Testament is the same 27 books across nearly all Christian Bibles.
Why the Number of Bible Books Differs
The Bible was not assembled as one book written at one time.
It is a library of sacred texts written over many centuries in Hebrew, Aramaic, and Greek.
Different Jewish and Christian communities preserved and received different sets of writings.
The key issue is canon formation, the historical process by which communities recognized certain texts as inspired and excluded others.
In the Old Testament, the most significant differences involve books called the Deuterocanonical books by Catholics and the Apocrypha by many Protestants.
- Hebrew Bible / Tanakh: the Jewish canon used as the basis for most Protestant Old Testaments
- Septuagint: the ancient Greek translation of Jewish Scriptures, which included additional books
- Christian canon traditions: Catholic, Orthodox, and Protestant communities developed related but different Old Testament lists
How Many Books Are in the Protestant Bible?
The Protestant Bible has 66 books: 39 in the Old Testament and 27 in the New Testament.
This is the most common count in English-language Bibles used by evangelical, Baptist, Pentecostal, and many mainline Protestant churches.
Protestant Old Testament: 39 books
The Protestant Old Testament follows the same core collection found in the Hebrew Bible, though the books are arranged differently.
For example, the Twelve Minor Prophets are counted as one book in Jewish tradition but appear as separate books in most Christian Bibles.
Protestant New Testament: 27 books
The New Testament includes the four Gospels, Acts, the Epistles, and Revelation.
These 27 books are standard across Protestant, Catholic, and Orthodox traditions.
How Many Books Are in the Catholic Bible?
The Catholic Bible contains 73 books: 46 in the Old Testament and 27 in the New Testament.
The additional Old Testament books are traditionally called Deuterocanonical books.
The Deuterocanonical books included in Catholic Bibles
- Tobit
- Judith
- Wisdom
- Sirach
- Baruch
- 1 Maccabees
- 2 Maccabees
- Additional sections of Esther and Daniel
Catholic teaching recognizes these books as part of the Old Testament canon.
They appear in Catholic editions of the Bible and are read in liturgy and doctrine.
How Many Books Are in the Eastern Orthodox Bible?
Eastern Orthodox Bibles generally include more books than Catholic or Protestant Bibles, though the exact total varies by church tradition and local usage.
Common counts range from 76 to 81 books.
Orthodox canons often include some or all of the following texts:
- 1 Esdras
- 3 Maccabees
- Psalm 151
- Prayer of Manasseh
- Additional Psalm and prophecy materials in some traditions
Because Eastern Orthodoxy includes several autocephalous churches with slightly different liturgical traditions, there is not one universally fixed Orthodox count in the same way there is for Protestant or Catholic Bibles.
What Is in the Old Testament?
The Old Testament is the collection of writings that predates the life of Jesus and forms the scriptural foundation shared, with differences, by Jews and Christians.
It includes law, history, poetry, wisdom literature, and prophecy.
- Law: Genesis, Exodus, Leviticus, Numbers, Deuteronomy
- History: Joshua through Esther
- Wisdom and poetry: Job, Psalms, Proverbs, Ecclesiastes, Song of Songs
- Major prophets: Isaiah, Jeremiah, Lamentations, Ezekiel, Daniel
- Minor prophets: Hosea through Malachi
Catholic and Orthodox Bibles expand this list with additional books or sections preserved in the Greek tradition.
What Is in the New Testament?
The New Testament has 27 books in every major Christian tradition.
It centers on the life, death, and resurrection of Jesus Christ and the early Christian church.
- Gospels: Matthew, Mark, Luke, John
- History: Acts
- Pauline letters: Romans through Philemon
- General letters: Hebrews, James, 1 Peter, 2 Peter, 1 John, 2 John, 3 John, Jude
- Apocalyptic literature: Revelation
This 27-book New Testament was broadly recognized by the fourth century and remains the same in most printed Bibles today.
Why Do Some Bibles Have Apocrypha?
Some Bible editions include a section called the Apocrypha, especially older Protestant printings and certain academic editions.
These books are often the same as the Deuterocanonical books found in Catholic Bibles.
In Protestant publishing, the Apocrypha is sometimes placed between the Old and New Testaments or omitted entirely.
In Catholic Bibles, those same books are part of the main Old Testament canon rather than a separate appendix.
How Can You Tell Which Bible Tradition You Are Reading?
You can usually identify a Bible’s tradition by checking its table of contents and the number of books listed.
A few clues make this easy:
- 66 books: likely Protestant
- 73 books: Catholic
- 76+ books: likely Eastern Orthodox or a related tradition
- Apocrypha section included: often a Protestant or academic edition
Publisher notes, footnotes, and introductory material often explain which canon the edition follows.
How Many Books Are in the Bible According to History?
Historically, there was not one universally agreed Bible count in the earliest centuries of Christianity.
Different regional churches used slightly different collections, especially in the Old Testament.
Over time, the Catholic Church formalized its canon at the Council of Trent in the 16th century, while Protestant reformers returned to the Hebrew canon for the Old Testament.
That history explains why the same faith roots can lead to different book totals.
The New Testament settled into the same 27-book form across mainstream Christianity, but the Old Testament remained the main point of variation.
Common Questions About Bible Book Counts
How many books are in the Bible if you count the Apocrypha?
It depends on the tradition.
In a Protestant Bible with the Apocrypha included, the total is usually 80 books if the Apocrypha is added to the standard 66-book canon.
Are the books of the Bible always in the same order?
No.
The core contents are similar, but the order can differ between Jewish, Protestant, Catholic, and Orthodox Bibles.
The sequence of books often reflects theology, liturgy, or historical grouping.
Is the Bible the same as the Hebrew Bible?
Not exactly.
The Hebrew Bible corresponds most closely to the Protestant Old Testament in content, though ordering and naming conventions differ.
Christian Bibles also include the New Testament, which the Hebrew Bible does not contain.
Book Count Summary by Canon
- Protestant: 39 Old Testament + 27 New Testament = 66
- Catholic: 46 Old Testament + 27 New Testament = 73
- Eastern Orthodox: varies, often 76 to 81 total
If you are asking how many books are in the Bible in the most widely used English-language Protestant sense, the answer is 66.
If you mean the Catholic Bible, the answer is 73, and Orthodox Bibles include a broader collection still.
