The Book of Mormon is a religious text of the Latter Day Saint movement, first published in 1830 by Joseph Smith as The Book of Mormon: An Account Written by the Hand of Mormon upon Plates Taken from the Plates of Nephi.

The book is one of the earliest and most well-known unique writings of the Latter Day Saint movement. The denominations of the Latter Day Saint movement typically regard the text primarily as scripture (sometimes as one of four standard works) and secondarily as a record of God's dealings with ancient inhabitants of the Americas. Most Latter Day Saints view the book as a record of actual history, though perspectives vary by denomination: some emphasize its spiritual inspiration rather than literal history, while others - particularly the LDS Church - regard it as both literal history and the central "keystone" of their faith.

The Book of Mormon has a number of doctrinal discussions on subjects such as the fall of Adam and Eve, the nature of the Christian atonement, eschatology, agency, priesthood authority, redemption from physical and spiritual death, the nature and conduct of baptism, the age of accountability, the purpose and practice of communion, personalized revelation, economic justice, the anthropomorphic and personal nature of God, the nature of spirits and angels, and the organization of the latter day church. The pivotal event of the book is an appearance of Jesus Christ in the Americas shortly after his resurrection. Common teachings of the Latter Day Saint movement hold that the Book of Mormon fulfills numerous biblical prophecies by ending a global apostasy and signaling a restoration of Christian gospel.

The Book of Mormon is divided into smaller books - which are usually titled after individuals named as primary authors - and in most versions, is divided into chapters and verses. Its English text imitates the style of the King James Version of the Bible. The Book of Mormon has been fully or partially translated into at least 112 languages.