Joseph Smith Jr. remains one of the most consequential and contested figures in American religious history — a teenager who claimed to have seen God, a man who published a scripture and built a city, and a leader whose practice of plural marriage still sparks fierce debate. This biography traces his journey from a Vermont farmhouse to the top floor of a jail in Carthage, Illinois.
Born: December 23, 1805, Sharon, Vermont ·
Died: June 27, 1844, Carthage, Illinois ·
Age at death: 38 ·
First wife: Emma Hale, married 1827 ·
Documented plural wives: about 30–40, depending on the source
Quick snapshot
- Born December 23, 1805, in Sharon, Vermont PBS American Experience
- Killed by a mob at Carthage Jail on June 27, 1844 LDS Church
- Practiced plural marriage in Nauvoo BYU Religious Studies Center
- The exact number of plural wives—estimates range from 29 to over 40 FAIR
- The precise number of underage wives beyond documented cases FAIR
- The verbatim last words spoken before death—eyewitness accounts differ Wikipedia
- Whether the sealing to Helen Mar Kimball involved a sexual relationship—the LDS Church says it was “for eternity alone,” but independent historians note the lack of definitive evidence Dialogue Journal
- 1820: Reported First Vision as a teenager Joseph Smith Papers
- 1830: Book of Mormon published; church organized LDS Church
- 1843: Sealed to Helen Mar Kimball at age 14, per the Joseph Smith Papers
- 1844: Killed at Carthage Jail Wikipedia
- The LDS Church’s official essays continue to shape the historical narrative LDS Church
- Primary-source scholarship via the Joseph Smith Papers continues to expand (LDS Church)
- Public debate over his legacy persists in academic and popular forums PBS American Experience
Here is a quick reference table of key biographical facts.
| Full name | Joseph Smith Jr. |
|---|---|
| Born | December 23, 1805, Sharon, Vermont, U.S. |
| Died | June 27, 1844, Carthage, Illinois, U.S. |
| Age at death | 38 |
| First wife | Emma Hale Smith (married 1827) |
| Known for | Founding the Latter Day Saint movement and publishing the Book of Mormon |
The biographical core is stable—birth, founding, death—but the interpretive space around his polygamy and final days remains contested. Even the most basic numbers shift depending on which archive you consult, from the count of wives to the words he uttered as he fell.
Why did Joseph Smith create Mormonism?
Smith grew up during the Second Great Awakening, a period of intense religious revival in upstate New York. His family was deeply religious but fractured by denominational competition.
How did Joseph Smith found Mormonism?
- Smith reported a divine vision as a teenager, later called the First Vision.
- He published the Book of Mormon in 1830, claiming it translated from ancient plates.
- He formally organized the Church of Christ on April 6, 1830 Joseph Smith Papers (historical project).
What is the First Vision account?
Smith later recounted that in 1820, at age 14, he prayed in a grove near his home and saw God the Father and Jesus Christ. The earliest written account dates to 1832 LDS Church (official essays). The vision became the foundational story of the movement, with Smith’s later accounts adding more detail.
How old was Joseph Smith when he married his 14-year-old wife?
Helen Mar Kimball is the best-documented case of an underage plural wife, and her age at sealing has become a flashpoint in discussions of Smith’s polygamy.
Who was Helen Mar Kimball?
Helen Mar was born August 22, 1828, in Mendon, New York Joseph Smith Papers (documentary archive). Her father, Heber C. Kimball, was a close associate of Smith. She later married Horace Whitney and became a defender of plural marriage LDS Church (official essays).
When were they married?
She was sealed to Smith circa May 1843 Joseph Smith Papers (documentary archive), making him 37 and her 14. The LDS Church’s official essay describes her as the youngest of Smith’s plural wives LDS Church (official essays). She later said the sealing was “for eternity alone,” implying no sexual relationship LDS Church (official essays).
The church’s own essay frames Helen’s sealing as a permanent spiritual bond, not a conventional marriage—but the age gap of 23 years and the secrecy of the practice make that framing hard for modern readers to accept at face value.
What this means: the age question is not a detail—it’s the heart of the moral reckoning many readers bring to Smith’s polygamy. The best-documented case involves a 37-year-old man and a 14-year-old girl, and no amount of theological framing changes that arithmetic.
How many wives did the prophet Joseph Smith have?
There is no single authoritative count. Estimates range from 29 to 40 or more, and the discrepancy reflects incomplete records, destroyed documents, and differing definitions of marriage.
How many underage wives did Joseph Smith have?
Conservative estimates say Smith had 30 plural wives total, with 7 under age 18 FAIR (apologetics research group). A BYU Religious Studies Center article says Smith married four brides under 20 in May 1843 alone, with Helen Mar Kimball at 14 being the youngest BYU Religious Studies Center (academic research). The Church’s essay notes that most women sealed to him were between 20 and 40 years old, with the oldest at 56 LDS Church (official essays).
What is the evidence for plural marriage?
- Official LDS Church essays acknowledge Smith’s participation in plural marriage LDS Church (official essays).
- Historical records, including the Joseph Smith Papers, document sealings to multiple women Joseph Smith Papers (documentary archive).
- Dialogue Journal’s overview lists 33 plural wives, calling Helen Mar his youngest Dialogue: A Journal of Mormon Thought (academic journal).
The exact count matters less than the pattern it reveals: Smith conducted plural marriages in secret, to women and girls, while publicly denying the practice for years. That gap is not a minor historical footnote—it’s central to how his legacy is judged.
The pattern here is instructive: official church sources and independent historians agree on the broad strokes, but disagree on the details. That divergence—not the raw numbers—is the real finding. For readers, the takeaway is that the count itself is less reliable than the documented fact of multiple underage sealings.
What disease did Joseph Smith have?
As a child, Smith suffered from a severe leg infection that nearly cost him his leg—and possibly his life.
What surgery saved Joseph Smith’s leg?
When Smith was about seven years old, doctors diagnosed a severe infection, often described as osteomyelitis—a bone infection that causes intense swelling and risk of sepsis FAIR (apologetics research group). Physicians reportedly recommended amputation, but Smith refused. Surgeons instead performed a risky procedure without anesthesia, using a lancet and a piece of wood to grate away infected bone fragments. The surgery saved his leg and left him with a permanent limp.
The operation became a documented event in his early life, and is still noted in community records Joseph Smith Papers (historical project).
How old was Joseph Smith during the leg surgery?
He was roughly six to eight years old, based on family accounts of the timeline—the event fits a window between 1812 and 1813 LDS Church (official essays).
The leg surgery is often cited as the first sign of the resilience that defined Smith’s life—but it also points the other way: a childhood of pain and crisis that may have shaped his sense of a divine mission.
The implication: a childhood medical crisis at age six became a defining biographical detail—it shows the early adversity that preceded the religious claims. It also gives modern readers a humanizing anchor on a figure often seen only through the lens of later controversy.
What led to the death of Joseph Smith?
Smith’s death was not a random act of violence—it was the culmination of escalating conflict between his movement and its neighbors in Illinois and Missouri.
Why was Joseph Smith assassinated?
Smith and his brother Hyrum were killed on June 27, 1844, at Carthage Jail in Carthage, Illinois Joseph Smith Papers (historical project). The immediate trigger was the destruction of a newspaper, the Nauvoo Expositor, which had criticized Smith and his practices. Smith ordered the press destroyed, leading to charges of riot and treason. While awaiting trial in the jail, a mob stormed the building PBS American Experience (documentary series). Hyrum was shot first; Joseph tried to escape through a window and was shot multiple times as he fell BYU Religious Studies Center (academic research).
Where was Joseph Smith killed?
- He was at Carthage Jail when the mob attacked.
- He was shot and killed while attempting to flee through a second-story window.
- His brother Hyrum died beside him.
The broader context includes political tensions over Smith’s growing power as mayor of Nauvoo, fears of his militia, and hostility toward the practice of plural marriage. The combination—religious, political, and social—made him a target PBS American Experience (documentary series).
What were Joseph Smith’s last words before he died?
Eyewitness accounts of the Carthage Jail attack differ in detail, and the exact words Smith spoke as he fell are disputed FAIR (apologetics research group).
What happened at Carthage Jail?
According to eyewitness John Taylor’s later account, Smith attempted to defend himself with a cane before the mob entered. Taylor was shot multiple times but survived. Willard Richards was in the room and gave a brief account of the attack FAIR (apologetics research group).
Who was with Joseph Smith when he died?
His brother Hyrum and two other apostles, John Taylor and Willard Richards, were present PBS American Experience (documentary series). Some accounts report that Smith cried out, “O Lord, my God!” as he fell from the window. However, the chaos of the moment—the gunfire, the smoke, the shouting—means no single account can be verified as exact FAIR (apologetics research group).
The romanticized version of a martyr’s final prayer is a retail product—stirring but unverifiable. The better evidence points to a desperate, confusing scramble for survival, not a staged exit.
Why this matters: the last-words debate is a proxy for the larger question—was Smith a prophet who met a martyr’s end, or a politician who misread the risk until it was too late? The evidence supports neither pure martyrdom nor pure calculation, but a mix of both.
Confirmed facts vs. Known uncertainties
Confirmed facts
- Joseph Smith was born in 1805 and died in 1844 PBS American Experience
- He founded the Latter Day Saint movement and published the Book of Mormon Joseph Smith Papers
- He practiced plural marriage, as documented by church and academic histories LDS Church
- He was killed by a mob at Carthage Jail in 1844 Wikipedia
What remains unclear
- The exact number of Joseph Smith’s plural wives FAIR
- The precise number and ages of any underage wives, beyond best-documented cases such as Helen Mar Kimball FAIR
- The verbatim last words spoken before his death FAIR
- Whether the sealing to Helen Mar Kimball involved a sexual relationship—the LDS Church says it was “for eternity alone,” but independent historians note the lack of definitive evidence Dialogue Journal
The distinction between confirmed and uncertain is central to any honest biography of Smith.
Quotes from key voices
“O Lord, my God!”
— Reported last words of Joseph Smith, as recalled by eyewitnesses at Carthage Jail. The exact wording remains debated across FAIR’s historical account.
“The youngest of his plural wives was Helen Mar Kimball.”
— The Church of Jesus Christ of Latter-day Saints, in its official Plural Marriage in Kirtland and Nauvoo essay.
“There is no definite evidence that Helen Mar Kimball did not have relations with Joseph Smith.”
— Dialogue Journal, in its overview of Smith’s 33 plural wives A Trajectory of Plurality.
“Smith’s life as a religious leader, polygamist, and civic founder.”
— PBS, in its The Mormons documentary series.
The voices above represent the two poles of Smith scholarship: the official church position, which acknowledges plural marriage but frames it as a difficult but sincere religious practice, and independent historians, who emphasize the absence of evidence regarding the nature of relationships with the youngest wives. Both sides agree on the basic facts—the disagreement is about interpretation.
Summary
Joseph Smith’s life story is a series of collisions between private conviction and public consequence. He founded a religion, built a city, and took an uncommon number of wives, including at least one who was 14. His death at Carthage Jail was not a tragedy of accident but a violent climax born of his own political and religious choices. For anyone studying American religious history, the lesson is that Smith remains impossible to reduce to a single label—he was simultaneously a prophetic figure, a civic leader, an accused conspirator, and a man whose private life still forces hard questions about power and faith. For historians and believers alike, the choice is clear: confront the full record, including the parts that embarrass a beloved origin story, or settle for a sanitized version that misses what his life actually teaches.
josephsmithspolygamy.org, debunking-cesletter.com, churchofjesuschrist.org, thirdhour.org, defendingjoseph.com
Frequently asked questions
Who was Joseph Smith?
Joseph Smith was the founder of the Latter Day Saint movement, the publisher of the Book of Mormon, and the organizer of the Church of Christ in 1830. He was killed in 1844 at Carthage Jail.
Where was Joseph Smith born?
He was born in Sharon, Vermont, on December 23, 1805, to Joseph Smith Sr. and Lucy Mack Smith.
Who was Emma Hale Smith?
Emma Hale was Smith’s first wife, married in 1827. She remained his wife for life and was a foundational figure in the movement.
Who led the Latter Day Saints after Joseph Smith died?
Most Latter-day Saints followed Brigham Young after Smith’s death, while others followed Sidney Rigdon or Smith’s son. This led to a succession crisis and the eventual establishment of the LDS Church under Young.
How old was Joseph Smith when he died?
He was 38 years old when he was killed on June 27, 1844.
Does the LDS Church acknowledge Joseph Smith’s plural marriages?
Yes. The church’s official essays, including “Plural Marriage in Kirtland and Nauvoo,” acknowledge Smith’s practice of plural marriage and its ongoing relevance to LDS history.
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James Mitchell is Editor-in-Chief at Southern Monitor, overseeing editorial standards, publication decisions and corrections.