Latter Day Saint martyrs are persons who belonged to The Church of Jesus Christ of Latter-day Saints (LDS Church) or another church within the Latter Day Saint movement who were killed or otherwise persecuted to the point of premature death on account of their religious beliefs, or while performing their religious duties.

Although the term "martyr" is not frequently used in Latter Day Saint terminology, Latter Day Saints recognize a number of prophets, apostles, and other religious persons as recorded in the Bible, including both the Old Testament and New Testament, and Book of Mormon as martyrs within the same religious tradition (albeit at an earlier time) to which they subscribe. For Latter Day Saints, the most notable martyr is Jesus Christ. Other scriptural examples include Abel ("the first martyr"), John the Baptist, James, the brother of John, Stephen whose stoning is recorded in the Book of Acts, Abinadi, women and children of Ammonihah, etc. Latter Day Saints also acknowledge as "Early-day Saint" martyrs those early Christians who were killed for their faith prior to or as a result of the Great Apostasy.

The most notable post-Biblical Latter Day Saint martyrs are Joseph Smith and his brother, Hyrum Smith.

Individuals who die "in the Lord's service" are believed to be rewarded with eternal life: "And whoso layeth down his life in my cause, for my name's sake, shall find it again, even life eternal." Joseph F. Smith, LDS Church president, declared: "I beheld that the faithful elders of this dispensation, when they depart from mortal life, continue their labors in the preaching of the gospel ... in the great world of the spirits."

In 1989, following the death of two LDS Church missionaries in Bolivia, apostle L. Tom Perry noted that from 1831 until 1989, "only seventeen LDS missionaries [were] killed by assassins." Also at that time, apostle M. Russell Ballard "indicated that of the 447,969 missionaries who have served since the days of Joseph Smith, only 525—about one-tenth of 1 percent—have lost their lives through accident, illness, or other causes while serving. 'When you contemplate that number,' he said, 'it appears that the safest place to be in the whole world is on a full-time mission.'"

Missionaries who died from illness or accident are not listed. However, depending on the circumstances of their death, they could be deemed "martyrs" for having died while in religious service.. Concerning Adolf Haag, John Alexander Clark, Edgar D. Simmons, and Emil J. Huber.

Many Mormon pioneers and other early church members who suffered privation and early death on account of their religious beliefs would likely qualify as "martyrs." However, they are too numerous to list here. This list also does not include early Mormon settlers who were killed in encounters with Native Americans during the Mormon settlement of the American West.

List of Latter Day Saint martyrs Death date Location Name Church Cause of death Age at deathJanuary 7, 1832Pomfret, VermontJoseph B. Brackenbury (missionary)Church of ChristPoisoning43November 5, 1833Battle near the Blue, Jackson, MissouriAndrew BarberShot in battle [November 4] by Robert Patten - died the next dayDaniel Stanton statement, circa 1842 https://catalog.churchofjesuschrist.org/record/3bcec479-db3b-460c-ab2b-1cf1300ce124?view=browse17October 25, 1838Battle of Crooked River, MissouriGideon CarterChurch of Jesus Christ of Latter Day SaintsKilled in battlePatrick O'BanionKilled in battle by John LockhartDavid W. Patten (apostle)Killed in battle39December 1838Haun's Mill, MissouriHiram AbbottMassacre; died in December 1838 from woundsDavid Lewis autobiography, 1854 Call Number MS 13716 https://catalog.churchofjesuschrist.org/record/d9dd0acc-9381-47c5-8c4c-9c996ed19f33?view=browseMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp31,268,320,412,486,488,491,7231886 History of Caldwell and Livingston counties, Missouri, p. 149 http://cdm.sos.mo.gov/cdm/compoundobject/collection/mocohist/id/62024/rec/74 Joyce, Burr, The Haun's Mill Massacre, St. Louis Globe-Democrat, 27 September 1887Joseph Young affidavit of Haun's Mill massacre http://cdm15999.contentdm.oclc.org/cdm/ref/collection/p15999coll24/id/26184\25October 30, 1838Elias Benner Sr.MassacreMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp31,136,268,418,488,491,72343John ByersMassacreMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp268,488,491Alexander CampbellMassacreMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp31,268,488,491,723October 31, 1838Simon CoxMassacre; mortally wounded and lived until the next morningMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp30-31,268,320,488,723October 30, 1838Josiah FullerMassacreMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp31,268,320,451,488,491,72335Austin Hammer Sr.MassacreMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp268,320,488,491,72334John LeeMassacreMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp268,320,488,4911886 History of Caldwell and Livingston counties, Missouri, p. 149Benjamin Franklin LewisMassacre; shot by Mr. Rockholt, lived a few hoursMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp31,268,275-276,320,488,491,722-72335Thomas White McBride (justice of the peace)Massacre; shot in chest by Jacob Rogers with his own gun; head and body hacked with a corn knifeMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp31,90,117,260,267,275,282,320,409,417,467,474,487-88,491,539,542,722-23The Church of Jesus Christ of Latter-day SaintsNathan Kinsman Knight autobiographical sketch https://catalog.churchofjesuschrist.org/record/6ca5292f-e6b9-4e93-88e5-655e14166dc3?view=browseThe Church of Jesus Christ of Latter-day Saints62James McBride autobiography https://catalog.churchofjesuschrist.org/record/5e8e6f91-bbd9-4f1a-a9e9-6c9d741ac64b?view=browseNovember 1838Charles Merrick (from Kirtland Camp)Massacre; died 25 November 1838 from woundsMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp31,260,268,275,320,457,488,491,505,537,539,722-239October 30, 1838Levi Newton Merrick (from Kirtland Camp)MassacreMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp31,268,320,441,488,491,505,722-2330William Napier Sr.MassacreMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp31,268,296,320,488,491,506,7231886 History of Caldwell and Livingston counties, Missouri, p. 149 http://cdm.sos.mo.gov/cdm/compoundobject/collection/mocohist/id/62024/rec/74 43George Spencer Richards (from Kirtland Camp)Massacre15Sardius Washington Smith (from Kirtland Camp)Massacre; top of skull blown off from musket shot by William ReynoldsMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp31,90,117,260,268,275,320,408,452,487-88,491,537-38,72310Warren Smith (from Kirtland Camp)MassacreMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp31,90,117,268,320,408,487-88,491,537-39,72344October 31, 1838John York Jr.Massacre; mortally wounded and died the next dayMormon Redress Petitions: Documents of the 1833–1838 Missouri Conflict, Edited by Clark V. Johnson, 1992, http://cdm15999.contentdm.oclc.org/cdm/ref/collection/rsc/id/44782/pp31,267,320,488,491,558,72362May 27, 1840Nauvoo, IllinoisEdward Partridge (bishop)Persecution46August 20, 1840Marietta Carter HolmesMob attack in her home