Presbyterian Church in America affirms the 66 books of the Protestant canon as the complete Scripture. The deuterocanonical books (Tobit, Judith, Sirach, Wisdom, Baruch, 1-2 Maccabees, and portions of Daniel and Esther) are not included in the PCA's canon. While these books have historical and spiritual value, they are not granted the authority of Scripture.

The PCA's Protestant identity requires a clear canonical boundary. The Westminster Confession affirms the 66 books as the authoritative Word of God. Books accepted by the Roman Catholic and Eastern Orthodox communions but not by Protestant Reformation churches are classified as apocryphal or deuterocanonical and are not binding in doctrine or practice.

The PCA's position reflects the doctrine of sola scriptura: Scripture alone is the ultimate authority for faith and practice. Post-biblical books, regardless of their antiquity or ecclesiastical use, do not possess scriptural authority. This distinction between Scripture and tradition is foundational to Reformed theology.