The question of “how many books are in the Bible” elicits a surprisingly nuanced answer, as the precise count varies depending on the specific Christian tradition. What constitutes “the Bible” — the collection of sacred texts considered to be divinely inspired — is defined by its canon. A “canon” (from the Greek kanōn, meaning “measuring rod” or “standard”) is the authoritative list of books accepted as scripture. Understanding the different canons is key to appreciating why the number of books differs.
The Protestant Canon: 66 Books
The Protestant Bible, widely used by Evangelical and many other Protestant denominations, contains 66 books. This canon is divided into two main sections:
- Old Testament (39 books): This section primarily recounts the history of God’s relationship with Israel, law, prophecy, and wisdom literature, written before the time of Jesus.
- New Testament (27 books): This section focuses on the life, ministry, death, and resurrection of Jesus Christ, the birth and growth of the early church, and apostolic teachings and prophecy.
The Protestant Old Testament largely corresponds to the Hebrew Bible (Tanakh), though the order and division of books differ. The formation of this canon was solidified during the Protestant Reformation, adhering closely to the Hebrew Masoretic Text. Read more about the Old Testament
The Catholic Canon: 73 Books
The Roman Catholic Bible includes 73 books, comprising the 66 books found in the Protestant canon plus seven additional books in the Old Testament. These additional books are known as the Deuterocanonical books (meaning “second canon”) to Catholics, and Apocrypha (meaning “hidden things”) to Protestants. These books include:
- Tobit
- Judith
- 1 Maccabees
- 2 Maccabees
- Wisdom of Solomon
- Sirach (Ecclesiasticus)
- Baruch
- Additions to Esther and Daniel
These books were part of the Septuagint, the ancient Greek translation of the Hebrew scriptures, and were widely used by early Christians. The Council of Trent (1545-1563 AD) formally affirmed these books as canonical for Catholics in response to the Protestant Reformation.
The Orthodox Canons: Varying Counts (Up to 78 Books)
Eastern Orthodox Churches generally include even more books in their Old Testament canons than Roman Catholicism. While there is some variation among different Orthodox traditions (e.g., Greek, Russian, Ethiopian Orthodox), they typically accept the Deuterocanonical books plus others. Common additions beyond the Catholic canon might include:
- 3 Maccabees
- 4 Maccabees (often in an appendix)
- 1 Esdras
- Psalm 151
- The Prayer of Manasseh
These variations reflect different historical trajectories and textual traditions within the broader Christian faith. Despite these differences in the number of books, all Christian traditions affirm the core narrative of salvation history and the essential doctrines found within their respective canons. The fundamental message of God’s redemptive plan remains consistent across these canonical distinctions. As 2 Timothy 3:16 states, “All Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness.” This verse, foundational to all Christian traditions, speaks to the divine origin and purpose of God’s inspired word, regardless of the precise count of its components.