Martha McBride Knight Smith Kimball (March 17, 1805 – November 20, 1901) was a founding member of the Relief Society of the Church of Jesus Christ of Latter Day Saints, which was organized on her birthday in 1842. She was married to early Latter Day Saint leader Vinson Knight, by whom she had seven children. In 1842 she was sealed as a plural wife to Joseph Smith, Jr. In January 1846, she was married polygamously to Heber C. Kimball, by whom she had one child, a son, who was born at Winter Quarters and died there as an infant. She later emigrated to Utah Territory, where she resided in various locations across the territory until her death at age 96. She was a witness to, and in some instances a key participant in, some of the pivotal events in early Latter Day Saint history.
Martha McBride was born on March 17, 1805 in Chester, Washington County, New York, the youngest of 9 children born to her parents, Daniel McBride and Abigail Mead. Martha’s father, an itinerant pre-Campbellite minister, moved the family to western New York, where he died when Martha was 18 years old. She married Vinson Knight, son of Doctor Rodolphus Knight and Rizpah Lee (daughter of American Revolutionary War Captain Sherebiah Lee), on July 26, 1826. They initially resided near Martha's relatives in Perrysburg, Cattaraugus County, where their first 4 children (Almira Knight, born 1827; Rizpah Knight, born 1829; Adaline Knight, born 1831; James Vinson Knight, born 1833) were born. Here Vinson acquired considerable wealth from his farm produce.
Starting in 1833, members of the McBride family began converting to the Latter Day Saint church. Martha and Vinson were baptized into the church soon thereafter, on March 24, 1834, after having been personally taught in their home by Joseph Smith.
In June 1835 Martha and her family moved to Kirtland, Ohio to gather with other Latter Day Saints. They resided in a fine home on the corner of Coudry and Joseph Streets near the Kirtland Temple (this home is still standing). Vinson was called as a counselor in the Kirtland bishopric. Vinson and Martha received their Patriarchal Blessings on June 24, 1835 at the hands of Joseph Smith, Sr. Martha gave birth to one son in Kirtland, Nathaniel Knight, in 1835 (for whom the name was selected by Joseph Smith, Sr.); he died on October 31, 1836. On January 2, 1837 Vinson and Martha signed the new Articles of Agreement of the Kirtland Safety Society.